Terreau Fafard pour cactus et plantes grasses - 8,8 litres

Total Nitrogen is important because it directly drives leafy growth, chlorophyll production, and overall growth speed, which sets the pace for the entire plant. It’s unique because the “total” number can include different nitrogen forms that behave differently in the root zone, meaning the same total amount can produce very different results depending on the nitrogen type and plant stage.

Available phosphoric acid provides a fast-absorbing form of phosphorus that fuels root growth, energy transfer, and strong flowering. It becomes part of the plant’s total available phosphate supply, but the two terms are not the same—available phosphoric acid is one source of phosphorus, while available phosphate refers to the entire pool of plant-available phosphorus overall.

Soluble potash (K2O) is important because it helps plants control water use, move sugars to new growth and fruit, and build stronger, higher-quality structure under stress. It’s unique from many other nutrients because it acts more like a regulator and transport helper than a direct “building material,” so the biggest benefits show up as steadier growth, stronger stems, and better finishing instead of just bigger leaves.

Calcium is important because it builds and stabilizes plant cells as they form, acting as the structural support that keeps new growth strong and functional. Unlike other nutrients that drive color or speed of growth, calcium’s role is unique because it controls cell wall strength and membrane stability, making it essential for healthy roots, shoots, and long-term plant resilience rather than quick visual results.

Sulfur is important because plants need it to build key amino acids and proteins that drive real growth, strong structure, and efficient use of nitrogen, making it uniquely different from “look-alike” nutrients that may change leaf color without supporting the plant’s core building process.

In tiny amounts, linseed oil can help a cactus and succulent potting mix stay airy and wet more evenly, which supports healthier roots and reduces stress from uneven moisture; it’s unique because it mainly changes the mix’s physical structure and water movement rather than feeding the plant like a nutrient.

Polyols can help roots handle dry-down stress and improve how small amounts of moisture stay plant-available, which supports healthier hydration without keeping the mix soggy—making them uniquely different from simple sugars that mainly feed microbes or ingredients that only hold water physically.

It’s important because it’s typically connected to polymer binder or coating chemistry that helps a cactus/succulent mix stay structurally stable, drain predictably, and maintain airflow around roots over time. It’s unique from most other mix ingredients because it isn’t a plant nutrient or a simple water-spreading additive—its value is in the durable structure it helps create in the growing medium.

Canadian sphagnum peat moss is important because it holds moisture evenly while still supporting air spaces that roots need for oxygen, which makes watering and nutrient uptake more consistent. It is unique because it naturally trends acidic and acts more like a moisture-and-structure foundation than a nutrient source, so it changes root-zone balance in ways other base ingredients do not.

Perlite is important because it increases root-zone oxygen and improves drainage, helping roots stay healthy and active; it’s unique because its main benefit is physical structure and airflow—not nutrients or moisture storage—so it fixes “too wet and compact” root problems in a simple, predictable way.

No, sand only improves drainage when the grains are coarse enough and the rest of the soil mix supports larger air spaces; fine sand can actually pack the soil tighter and reduce oxygen for roots. That’s why sand is unique compared to other structure ingredients: it can either open the mix or clog it, and the plant’s symptoms often look like watering or nutrient problems rather than a “sand problem.”