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NEWS OVERVIEW
CURRENT NEWS ABOUT SUBSTRATES, SOIL RESEARCH AND WORKSHOPS
5 april 2024
Spend substrate as raw material under the RHP Consumer quality mark
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5 april 2024
Summary technical meeting Riga
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5 april 2024
Steps forward again with scheme Responsibly Produced Coir
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5 april 2024
Did you miss RHP Online Research Update March 28th? Watch webinar on demand!
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4 march 2024
3-day basic course Potting Soil and Substrates in May/June
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1 march 2024
REMINDER: April 4 technical meeting for certified companies in Riga
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1 march 2024
RHP quality mark possible for plugs and other small preformed growing media
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1 march 2024
RHP certification for Van Egmond Potgrond
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1 MARCH 2024
The RAG product certification scheme has been updated!
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29 february 2024
Going in-depth with new growing media at Knowledge Day Substrate 11 April
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9 february 2024
Factsheet on fungal growth in and on growing media
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9 february 2024
RHP Online Research Update March 28
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1 february 2024
What has changed in the RHP product certification scheme?
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22 january 2024
Michelle van Winden new technical advisor in training at RHP
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22 january 2024
RHP technical advisors visit coir locations in Asia
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22 january 2024
Up-to-date standards through collaboration with the sector
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8 december 2023
The future of well-balanced growing media
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8 december 2023
RHP certification for Novarbo Oy
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21 november 2023
Register now for Dutch course Growing Media A or B!
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13 november 2023
Development of sustainability scheme for coir has begun
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13 november 2023
RHP participates in fair for students HAS green academy
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13 november 2023
European standard for plugs nearly final after RHP workshop
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16 october 2023
Vacancy technical advisor
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6 oCtober 2023
Factsheet on pesticides in potting soil and growing media
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6 october 2023
Sending in samples for weed test in winter period
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6 oCtober 2023
Did you miss the RHP Online Research Update? Watch the replay video!
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1 september 2023
Adding base fertilisers to substrates is essential
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1 september 2023
RHP-certificates in Minerva-database
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22 august 2023
Reprint RHP Peat Bog Flora available!
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7 july 2023
‘Growing media? Potting soil? Isn't that dusty and boring?’
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7 july 2023
Technical advisors are worldwide committed to high-quality growing media
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7 july 2023
Factsheet on human pathogens in potting soil and growing media
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16 JUNE 2023
RHP annual report 2022 is available!
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16 june 2023
RHP is going to digitize process to send product samples
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16 junE 2023
Brigit den Bakker completes internship at RHP
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9 JUNe 2023
Did you miss the RHP Online Research Update? Watch the replay video!
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12 may 2023
Development Responsibly Produced Coir initiated
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12 may 2023
Search for alternative raw materials for soil improvers
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12 may 2023
Learn all about RHP compost at the BVOR demo days
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7 april 2023
RHP does release test with certified fertilisers
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7 april 2023
Responsibly Produced Peat visits RHP
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7 APRIL 2023
Training and harmonisation day for auditors quality marks RHP and RAG
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3 march 2023
RHP plays a role in project availability of substrate raw materials
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28 february 2023
The RAG product certification scheme has been renewed!
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28 february 2023
Brigit den Bakker intern at RHP
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3 february 2022
knowledge Day Substrate 12 April dedicated to new growing media
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2 FEBRUARY 2023
What has changed in the RHP product certification scheme?
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26 january 2023
Register now for the course Growing Media A!
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17 january 2023
RHP scans a number of raw materials and growing media for residues
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16 january 2023
Various organisations get to know RHP
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16 january 2023
RHP speaks during International Soft Fruit Conference
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23 december 2022
The latest in new growing media
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8 december 2022
Martin Uittenbroek says goodbye as member of the Supervisory Board
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29 november 2022
Martine Holtkamp new director of RHP
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18 november 2022
Broad coalition for acceleration reduction environmental impact potting soil & growing media
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11 november 2022
Growing Media Europe and president CSPMA visit RHP
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11 november 2022
RHP speaks in European Parliament
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8 NOVEMBER 2022
RHP in conversation about visibility and sustainability
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8 november 2022
Packer’s code on RHP product under private label
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18 october 2022
RHP is getting more and more grip on wood fibre
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7 october 2022
Erik Swertz new coordinator Certification at RHP
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7 oCtober 2022
Sending in samples for weed test in winter period
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7 oktober 2022
Reanalysis or reassessment?
5 tips to avoid mistakes
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29 september 2022
Return day for participants course Growing Media A
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2 SEPTEMBER 2022
In 2023 RHP certified plugs on the market
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1 september 2022
RHP participates in research project on microbiological quality of growing media
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1 september 2022
RHP certification for Profile Products in US
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8 august 2022
RHP course program autumn/winter
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12 july 2022
RHP certification for Olde Bolhaar Eco Service
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12 july 2022
New temporary team member RHP: Remco Jansen
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3 june 2022
Is your transport properly checked?
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3 june 2022
Lots of attention for RHP webinar ‘Facts & fables of potting soil and substrate’
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20 May 2022
Refresher and harmonisation training for auditors quality marks RHP and RAG
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6 may 2022
RHP courses this fall
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25 april 2022
RHP webinar ‘Facts & fables of potting soil and growing media’
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21 april 2022
RHP joins FSI2025
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8 april 2022
More new growing media with RHP quality mark available thanks to adjusted standard
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8 april 2022
Did you miss the RHP Online Research Update? Watch the replay video!
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8 april 2022
Dutch webinar April 14th about RAG quality mark and requirements tree substrates
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24 March 2022
RHP starts standards and certification process for plugs
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4 march 2022
RHP research project into residue in raw materials
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4 march 2022
1:5 versus 1:1.5
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4 march 2022
RHP Online Research Update March 29th
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1 february 2022
RHP quality mark possible for acrotelm and composted bark
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1 february 2022
Updated RHP product certification scheme available
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1 february 2022
Product lists RHP certified fertilisers available at My RHP
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1 february 2022
This year Dutch in-company course RAG Landscaping A
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13 january 2022
Raymond Hedges new director of RHP
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21 december 2021
New RHP instruction video about potting reference
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30 november 2021
New RHP instruction video about choosing a fall controller
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30 november 2021
Summary Online Research Update November 9th
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30 november 2021
Missed the radio broadcast with RHP?
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28 oCtober 2021
New RHP instruction video about sampling EN 12579
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7 october 2021
Vacancy Director at RHP
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5 oCtober 2021
Sending in samples for weed test in winter period
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27 september 2021
New RHP instruction video about volume determination EN 12580
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27 september 2021
9 November: Online Research Update for certified companies
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23 september 2021
Course Growing Media A (Dutch and English)
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16 september 2021
One change in a mixture can have multiple consequences
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10 september 2021
Mulch Lensli now also RHP certified
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30 august 2021
Hein Boon is going to strengthen Responsibly Produced Peat
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26 july 2021
Broad coalition for sustainability of potting soil and substrates
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30 june 2021
Catarina Chemetova new technical advisor at RHP
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30 junE 2021
RHP certification for Remmy Substrates
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30 june 2021
An ode to the founding fathers of RHP
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30 junE 2021
Certified companies can order 1:5 sets at RHP
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30 JUNE 2021
Packaging, storage and application of growing media
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31 may 2021
RHP introduces new methods
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31 may 2021
July 1st publication update of RHP product certification scheme
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31 May 2021
RHP organic fertilisers and organic culture
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31 May 2021
Composition of growing media
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30 april 2021
Liesette van Schie Coordinator Certification at RHP
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30 APRIL 2021
Pressure plate for measuring potting density available again!
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30 april 2021
Videos on focus points of new growing media
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30 APRIL 2021
Physical aspects
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29 march 2021
pH and nutrition
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29 maRCH 2021
RAG quality mark guaranteed free from Japanese Knotweed
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29 march 2021
Watch replay video of first RHP webinar for consultants
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26 february 2021
Safety of (new) raw materials
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26 february 2021
Free RHP-webinars for consultants worldwide
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29 january 2021
Free RHP-webinars for certified companies and consultants worldwide
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29 january 2021
Animation video RHP quality mark now available with subtitles in multiple languages
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29 january 2021
How to handle products that are no longer RHP-certified?
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18 january 2021
Dates online course Growing Media A known
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7 december 2020
RHP introduces animation about clean, RHP-certified growing media
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16 november 2020
RHP certification for SQM Holland
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12 november 2020
Two vacancies at RHP: coordinator Certification and technical advisor
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30 october 2020
RHP organises online technical meeting ‘Acting with New Growing Media’
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30 october 2020
Michaela Petríková new research assistant at RHP
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26 oCtober 2020
Frank Woets leaves RHP
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29 september 2020
Moisture measurements in root balls: why increasingly important and how to do it right?
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29 september 2020
Course program 2020-2021
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29 september 2020
Sending in samples for weed test in winter period
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29 september 2020
Sample forms at My RHP updated
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31 august 2020
30 october: (online) technical meeting RHP
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31 august 2020
Do you want RHP certified mulch? You can!
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31 august 2020
Clean substrate contributes to a healthy culture
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22 JUne 2020
Changes of pH in growing media
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11 june 2020
No Japanese Knotweed in substrate with RAG quality mark
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4 june 2020
Extra measures during company visits due to coronavirus
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7 May 2020
Already 20 years ago: independent checks and accreditation RHP quality mark
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7 May 2020
Courses and meetings online due to corona measures
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7 May 2020
Retraining and harmonization day for auditors RHP quality mark
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6 april 2020
Periodic audits and product checks temporarily remotely
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6 april 2020
Research update: combining multiple components into one substrate
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6 april 2020
New look entrance for delivering samples
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18 march 2020
Our measures due to coronavirus
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16 march 2020
Knowledge Day Substrate canceled
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27 february 2020
Demonstrative experiment with peat that has been warm during storage
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27 february 2020
Samples for residue testing through RHP
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27 february 2020
What are the changes to the RHP product certification scheme this year?
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27 february 2020
Show that your products are RHP certified!
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30 january 2020
Become an acknowledged internal laboratory?
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28 january 2020
RHP certification for Eifel-Holz
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28 january 2020
RHP certification for Soltera
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27 january 2020
RHP rates per 2020
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17 december 2019
Dates of Growing Media A course known
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16 december 2019
Bernard Koeckhoven new chairman supervisory board
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16 december 2019
Physical analysis of substrates at Eurofins Agro will be adjusted
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16 december 2019
What does updated plan of action PFAS mean for RAG products?
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29 november 2019
Groundwork laid during RHP meeting safety, sustainability and quality
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29 november 2019
Dynamics around organic fertilizers
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29 november 2019
RAG quality mark in newly published protocol to prevent the spreading of Knotweed
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21 oCtober 2019
Soil products with RAG quality mark are unsuspected in terms of PFAS
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1 october 2019
Sending in samples for weed test in winter period
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30 september 2019
Video RAG Landscaping: reliable tree substrate of unprecedented importance
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30 september 2019
National norms for toxic PFAS substances in DUTCH ground
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30 september 2019
New useful method determining CRF dosage directly after substrate production
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30 september 2019
Vacancy technical advisor at RHP
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22 august 2019
Changes in Central College of Experts
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19 july 2019
Course program 2019-2020
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1 july 2019
RHP presentation phytosanitary test with Bacillus globigii appreciated with international award
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27 june 2019
RHP on phytosanitary certificate indicates effective treatment preventing harmful organisms
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27 june 2019
Second edition book ‘Soilless Culture: Theory and Practice’
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27 june 2019
Product sheet about perlite available
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6 may 2019
Changes in the organisation at RHP
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29 april 2019
Future EU import requirements growing medium attached to or associated with plants for planting
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11 april 2019
Clay in potting soil to control growth
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11 APRIL 2019
Summary technical meeting Riga
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1 april 2019
What are this years’ changes in the RHP product certification scheme?
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28 february 2019
Scientific field research into tree granulates starting
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28 february 2019
Research update: combining substrate components
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28 february 2019
Focus on nutritional elements: bicarbonate
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31 january 2019
Focus on nutritional elements: sodium and chloride
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31 january 2019
Latest versions forms for product samples at My RHP
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28 january 2019
RHP at IPM in Essen
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18 december 2018
RHP certification for Shakti Cocos
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18 december 2018
Summary technical meeting organic fertilizers
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18 december 2018
Focus on nutritional elements: molybdenum
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29 november 2018
Technical meeting organic fertilizers
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29 OCTOber 2018
Focus on nutritional elements: boron
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28 september 2018
New video about RHP Consumer quality mark for potting soil
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28 september 2018
Grower responsible for storage samples of slabs of mineral wool with RHP quality mark
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28 september 2018
Sending in samples for weed test
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25 september 2018
Course program 2018-2019
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30 august 2018
New setup RHP database Minerva
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30 AUGUST 2018
Focus on nutritional elements: copper
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30 august 2018
Lecture about tree substrate and practical RAG methods
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13 august 2018
RHP certification for Nestaan N.V.
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28 junE 2018
5 questions to grower and product group member Dion ten Have
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28 junE 2018
Focus on nutritional elements: zinc
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28 junE 2018
IPS jubilee symposium ‘Wise use of peatlands, past and future’
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1 junE 2018
Warning for willows
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29 may 2018
Hygiene protocol RHP: clean, cleaner, cleanest!
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29 may 2018
RHP explanatory video concerning bio assay
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29 may 2018
Focus on nutritional elements: manganese
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26 april 2018
RHP explanatory video about water uptake velocity substrates
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26 april 2018
New RHP sample forms on My RHP
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26 april 2018
Focus on nutritional elements: iron
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27 maRCH 2018
What will change in the RHP product certification scheme this year?
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27 march 2018
RHP explanatory video about potting
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27 march 2018
Focus on nutritional elements: sulphate
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27 february 2018
RHP explanatory video about measuring stability substrate components
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27 february 2018
Focus on nutritional elements: magnesium
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27 februarY 2018
Nele Ameloot new member of Supervisory Board RHP
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29 january 2018
Potting soil in the pot? Grower at the pH wheel!
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29 january 2018
Focus on nutritional elements: calcium
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23 JANUARy 2018
RHP certification for Plantacote N.V.
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21 december 2017
No antifreeze for RHP certified load
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21 december 2017
Focus on nutritional elements: potassium
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21 december 2017
RHP explanatory video about phytosanitary clean peat for bulb packaging
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30 november 2017
Video about RHP quality mark substrates
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30 november 2017
Focus on nutritional elements: phosphorus/phosphate
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30 november 2017
Combining constituents responsibly?
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31 october 2017
Report fungi problems, anonymously if necessary!
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31 october 2017
Focus on nutritional elements: Nitrogen
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31 october 2017
Sending in samples for weed test
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29 september 2017
Unique RHP WOK apparatus renewed and improved
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29 september 2017
5 points of notice when sending in samples
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31 august 2017
RHP certification for AS Tootsi Turvas
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31 august 2017
Course program 2017-2018
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31 august 2017
Updated English leaflet about RHP
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28 july 2017
RHP advice coir substrate for strawberries
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29 junE 2017
Avoid discussion about volume
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29 junE 2017
German workshop “What is in the pores; water or air?”
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29 june 2017
RAG substrates free from problematic weeds
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30 may 2017
Main subjects collective research RHP known
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30 may 2017
Determine weeds with the Weed Hunter
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30 may 2017
RHP shares knowledge with partners in new research project
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28 april 2017
How to adjust a mixture in 5 steps
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28 april 2017
Substrates central during technical meeting Riga
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28 april 2017
New face on RHP secretariat
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30 march 2017
New test plants in the bio assay?
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30 march 2017
Experiences running research organic fertilizers
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30 march 2017
Ruth Sluimer new office technical employee
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24 february 2017
RHP certification for 2 companies: Ekompany and Culterra
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24 february 2017
Help needed with calibrating
EN measurement cylinder?
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24 february 2017
Henri van Beerendonk new member Supervisory Board
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24 february 2017
Extranet becomes My RHP
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24 january 2017
NTA for green roofs published
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24 january 2017
“Fungus related problems are a collective problem that we need to solve together”
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18 january 2017
Weed hunter and knowledge base on new website!
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13 december 2016
Bacillus globigii new test organism in hygienisation processes
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13 december 2016
Will measuring tree sand in 'RAG Landscaping m3 Box' lead to new standard?
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13 december 2016
Damage, now what?
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31 october 2016
Course program 2016-2017
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31 october 2016
Research roof garden substrates nearly ready
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31 october 2016
RHP develops innovative method for steady soil blocks
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20 september 2016
RHP researches residues of crop protection agents in substrate raw materials
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20 september 2016
New employees at RHP
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20 september 2016
Last call for the workshop ‘What is in the pores; water or air?’
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