Or Brun Universal Potting Compost 20 L: the reliable choice for your plants

Or Brun Universal Potting Compost 20 L (Reference: OBRTUNI20N) represents French excellence in horticultural growing media. Designed by the Or Brun brand, a recognised specialist in organic soil improvers, this all-round compost meets the needs of every gardener, whether beginner or experienced. Its balanced formulation combines tradition and innovation to give your plants an optimal environment.

An all-round compost for every gardening project

Or Brun Universal Potting Compost 20 L stands out for its exceptional versatility. Whether you want to repot your indoor plants, create new beds in the garden, or set up your terrace with flowering tubs, this growing medium adapts to every situation. Private gardeners appreciate how easy it is to use for their balcony planters and foliage plants, while landscaping professionals favour it for its consistent performance.

This compost works just as well for ornamental crops (geraniums, petunias, begonias) as for vegetables in pots (cherry tomatoes, radishes, herbs). It can be used from spring to autumn, the best seasons for repotting and planting. The aerated structure of the mix encourages fast, vigorous rooting, which makes for stronger, more free-flowering plants.

A natural, balanced composition

The richness of Or Brun Universal Potting Compost lies in its carefully studied composition. Blond peat, the main component, ensures excellent water retention while keeping the roots well aerated. It brings the lightness needed to make the medium easy to work and to prevent compaction.

Wood fibre and composted bark strengthen the structure of the compost, creating porous spaces that favour root oxygenation. These organic materials break down slowly, releasing nutrients gradually. Composted horse manure naturally enriches the medium with nitrogen and potassium, while seaweed brings trace elements and natural growth stimulants.

This combination ensures a balanced pH suited to most plant species. With a dry matter content of 64.3% and organic matter of 41.9% on dry product, this compost has an ideal density for avoiding compaction problems.

Directions for use and application techniques

Using Or Brun Universal Potting Compost 20 L requires no particular preparation. For successful repotting, choose a container about three times the volume of the original root ball. Place a layer of 3 to 5 cm of compost in the bottom of the new pot, taking care not to block the drainage holes.

Place the plant carefully, centring the root ball, then fill the gaps with compost, firming lightly. Leave a space of 2 cm between the surface of the medium and the rim of the pot to make watering easier. Moderate watering immediately after repotting drives out the air bubbles and ensures good contact between the roots and the new medium.

For planting in open ground, mix the compost with the existing soil in a proportion of 30 to 50% depending on the quality of the soil in place. This practice considerably improves the structure and fertility of poor or clay soils. Upkeep is limited to occasional light forking of the surface to keep the medium aerated.

Expert advice and getting the best results

To get the most from Or Brun Universal Potting Compost, experts recommend pairing it with a liquid fertiliser during the active growing season (March to September). This combination ensures a steady supply of nutrients, particularly welcome for hungry flowering plants such as geraniums or surfinias.

In autumn, adding mulch or clay pebbles on the surface protects the medium from winter leaching and keeps the moisture in. This technique preserves the structure of the compost and limits the growth of moss. For acid-loving plants (azaleas, camellias, blueberries), work 10 to 20% of ericaceous compost into the universal compost to adjust the pH.

A frequent mistake is to over-water immediately after planting. Or Brun compost naturally retains moisture; wait until the surface starts to dry before watering again. For growing in tubs, provide a water reserve with clay pebbles at the bottom of the container. This tip reduces the watering burden and ensures a steady water supply, especially in summer.

Finally, renew part of the compost in your pots every 2 years by forking the surface and adding 20 to 30% of fresh medium. This revitalises the growing medium and makes up for the natural loss of nutrients.

Technical specifications