certified

RHP Horticulture

The quality mark RHP Horticulture is just as dynamic as the professional horticulture itself; continuously moving. This is the quality mark for substrates that offers guarantee to the grower. RHP Horticulture guarantees the quality of the product in the chain from extraction till processing at the buyer.

And the quality mark stands for the certainty that the substrate meets requirements, such as:
• Control of (disease risks).
• Guarantee of properties, as agreed before.

In short, growing media which comply with the wishes of the culture.

RHP Horticulture RHP Horticulture

Spearheads RHP Horticulture

Chemical aspects
RHP Horticulture gives insight in the chemical properties of substrates. The property of a substrate is closely connected with the kind of use and the plants which grow in it. Is it about lettuce, bedding plants or orchids; every plant has its own wish list. The pH is important, but also the (trace)elements. The RHP quality mark has requirements to the composition of additives (for ex. Fertilisers) which have been added to the substrate.

RHP makes high demands on the composition and the quality of fertilisers. Some examples:
The composition of basis potting soil-fertilisers has been effected on the basis of scientific research and practical experience. One thing and another has lead to the present composition, including a necessary and safe level of trace elements.
Specification of pH, EC and assessment on N-P-K. Soil samples of the practice and of substrate companies are analysed at RHP acknowledged laboratories. After that the data are assessed in the database of RHP, called Minerva.
The RHP-product is not allowed to fall outside the statutory regulations like they apply in the country of production and processing.
Controlled-release fertilisers (release pattern with specification ‘early - mid - late').

Physical properties
RHP is actively developing new parameters to guarantee you that RHP certified substrates guarantee for the basis of an optimal culture. Nothing may be left to chance! There is a number of internationally stated methods to analyse physical (and chemical) properties. However there a need for insight in a more broad range of properties.

New parameters which RHP is developing, are for example:
• Recording of the -biologic- stability.
• Water uptake and the WOK method (WOK = water uptake characteristic), it is determined how quickly a dry substrate takes up water.
• Specification on air content.
• RHP develops handles to adjust potting soil better to the potting situation.

Phytosanitary requirements
Substrates and raw materials which have the quality mark RHP Horticulture, must comply with a large number of requirements. The products must be clean and pure, so that there is no risk for the application in the culture. That already starts at the raw materials. If they are pure, then they also have to stay pure in the whole production process.

Amongst others, an RHP-product has to comply with the requirements below: • Use of peat from areas where no Agricultural activities have occurred. (no potential contamination). Preventing contamination and mixing during production in combination with strict logistic control.
• The prevention of weeds which could cause problems in a culture and/or in a country (for example tropical origin, invasive exotics).
• No organisms which form a risk for the culture (for example plant parasitic nematodes).

 

Products RHP Horticulture

  • Bark (Horticulture)

    Bark is almost always used as an ingredient of potting soil. There are two types of bark that are used in potting soil: composted bark and 'French' bark (origin: France, Portugal and Spain). French bark is also used as an important ingredient of orchid substrates.

    Members Bark (Horticulture)

  • Expanded clay granules (Horticulture)

    Expanded clay granules, also known as clay pebbles, are produced by heating clay that has special characteristics so that it expands. Expanded clay granules are used primarily for plants in offices, but they are also used as substrate for a variety of production crops.

    Members Expanded clay granules (Horticulture)

  • Wood fibre (Horticulture)

    Wood fibre is mainly applied as component in potting soils. Wood fibre is produced from fresh wood chips originating from pine trees. Chips are shredded under high mechanical pressure. Especially for the application in potting soils a base fertilisation can be given during the production of the wood fibre to avoid unwanted nitrogen immobilisation.

    Members Wood fibre (Horticulture)

  • Lime (Horticulture)

    Lime is used in the production of potting soil in order to give the potting soil the desired pH value (acidity). In both the Netherlands and Germany a lime type is produced especially for the production of potting soil.

    Members Lime (Horticulture)

  • Clay and claygranules (Horticulture)

    Clay and clay granules are used separately in potting soils to give this product its specific chemical and/or physical properties. The used types of clay originate from the Netherlands, Germany and Sweden.

    Members Clay and claygranules (Horticulture)

  • Coir products (Horticulture)

    The wide variety of coir materials used in horticulture, such as coir and coir fibre, originate from the husk of the coconut. Coir is used as a substrate for a wide range of crops. Small quantities of coir fibre can be mixed into potting soil.

    Members Coir products (Horticulture)

  • Perlite (Horticulture)

    Perlite is volcanic rock that expands when it is heated. In addition to its application in potting soil for professional use, perlite is increasingly used as pure substrate. It is very popular in crops such as tomato, cucumber and cut rose in particular.

    Members Perlite (Horticulture)

  • Potting soil fertilisers (Horticulture)

    Fertilisers are essential additives to potting soil. Fertilisers contain both main elements and trace elements. Because of the gradation they can easily be applied in specific quantities in the production of peat substrate. A potting soil fertiliser serves as basis fertilizing for the potting soil.

    Members Potting soil fertilisers (Horticulture)

  • Pumice stone (Horticulture)

    Pumice stone is porous rock of volcanic origin. It comes from countries such as Iceland and Germany. Pumice stone is suitable as an ingredient of potting soil, but most pumice stone is used as substrate for vegetable crops.

    Members Pumice stone (Horticulture)

  • RHP-compost (Horticulture)

    Compost is a product, which consists partially or entirely of one or more organic waste products that are decayed, with the help of micro organism, to such a stable finished product, that only slow decay of humus.combinations still takes place. The product is often used as soil improver.

    Members RHP-compost (Horticulture)

  • Rice hulls (Horticulture)

    Rice hulls are hulls from rice. The sterilised material originates from Italy. Rice hulls are used as an additive in potting soil for the cultivation of pot plants and trees in particular.

    Members Rice hulls (Horticulture)

  • Peat (Horticulture)

    Peat is bog moss (Sphagnum) that has decomposed under low-oxygen conditions. Peat is produced primarily in Ireland, Scandinavia, the Baltic States and Northern Germany. There are several types of peat, such as frozen black peat, white peat and sphagnum peat. Each type has its own physical characteristics.

    Members Peat (Horticulture)

  • Peaty substrates / potting soil (Horticulture)

    Potting soil is a substrate consisting of various raw materials. It's main ingredient is peat, to which other materials such as bark, coir or perlite can be added. Potting soil always contains fertilisers and lime. Potting soil is used as a growing medium for a wide range of cultures and be produced according to the specific needs of a culture. Potting soil (peaty substrates) is a substrate consisting of various raw materials. It's main ingredient is peat, to which other materials such as bark, coir or perlite can be added. Potting soil always contains fertilisers and lime. Potting soil is used as a growing medium for a wide range of cultures and can be produced according to the specific needs of a culture.

    Members Peaty substrates / potting soil (Horticulture)

  • Vermiculite (Horticulture)

    Vermiculite is a rock with a layered structure with mineral water between the layers. Through expansion a harmonica structure is coming through structure. Vermiculite is mostly used for litter for substrates. Within seedling substrates it is sometimes used as raw material.

    Members Vermiculite (Horticulture)

Members RHP Horticulture