RHP certified potting soil can be recognised by the RHP logo on the packaging
Potting soils with the RHP quality mark are available at among others garden centers, home depots, florists and supermarkets. A good potting soil takes care that plants have sufficient moisture and air near the roots, so that the roots can develop well. If the potting soil has a good structure, it can retain more water and nutrients so that the plant can develop in the best way. Always note the presence of the RHP quality mark when you buy potting soil; for a quality product that offers you more safety and security.