Or Brun Horticultural Potting Compost 20 Litres: For More Flourishing Potted Plants

The Or Brun Horticultural Potting Compost 20 Litres (Reference: OBRTHOR20N) represents excellence in growing media for all your potted gardening projects. Certified to NF U 44-551, this professional compost guarantees impeccable quality and meets the strictest requirements of the horticultural sector. Its expert formulation combines carefully selected raw materials to give your plants an optimal growing environment.

Benefits and versatile uses

This horticultural compost is intended for all gardening enthusiasts, whether beginners or experts. It is perfectly suited to repotting indoor plants such as foliage plants, hardy orchids, herbs or small decorative shrubs. For your outdoor planters and tubs, it makes an ideal base for seasonal flowers, urban vegetable crops and planting on terraces and balconies.

Landscaping professionals and horticultural growers value its versatility for plant display projects, temporary installations and the production of container-grown plants. Its balanced composition encourages vigorous rooting while stimulating the formation of flower buds for prolonged, spectacular flowering.

Technical composition and innovation

The formulation of Or Brun Horticultural Compost brings together fine raw materials: blond peat for water retention, wood fibre for aeration, composted bark for structure, topsoil for stability, green compost and horse manure for organic enrichment. This combination creates a growing medium with optimal physical and chemical properties.

With a dry matter content of 62.7% and organic matter of 43.9% on dry product, this compost offers an excellent stability-to-nutrition ratio. Its conductivity of 56 mS/m ensures a balanced supply of nutrients with no risk of root burn. The water retention capacity of 619 mL/L guarantees steady hydration of the roots while avoiding root asphyxiation thanks to its aerated structure.

The built-in fertiliser of natural origin releases the essential nutrients gradually, providing continuous feeding over several weeks without any need for immediate additional applications.

Setting up and practical use

Repotting with this compost follows a simple but careful method. Choose a container about three times the size of the root ball to allow optimal root development. Pour a first layer of compost into the bottom of the pot, place the plant gently so that the collar stays level with the surface, then fill the empty spaces progressively, firming lightly.

For new plantings, mix this compost with the existing soil in a 50/50 proportion to improve the soil structure. The initial watering should be generous to help the roots bond with the new growing medium, then adjust the frequency to the specific needs of each species.

Upkeep is limited to regular watering without excess and to an additional application of fertiliser after 6 to 8 weeks, when the initial nutrients begin to run out. Annual top-dressing with fresh compost maintains fertility for perennials in tubs.

Expert advice and optimisation

To get the most out of this compost, pair it with our specialised organic fertilisers according to the type of plants grown. Flowering plants will benefit from an extra supply of potassium, while foliage plants will appreciate a nitrogen supplement to intensify their leaves.

During hot spells, add a layer of organic mulch on the surface to limit evaporation and keep the roots cool. In winter, reduce watering but make sure the growing medium never dries out completely, especially for indoor plants exposed to heating.

Avoid the common mistake of over-watering, which can cause root asphyxiation despite the good structure of this compost. Test the moisture by pushing your finger in 3-4 cm: water only if this layer is dry. For acid-loving plants, mix this compost with ericaceous compost in a 70/30 proportion to lower the pH.

Technical specifications