At the garden centre, fifteen bags sit side by side, and not one knows what your lawn really needs. Our formulas come straight from sports-turf maintenance, and are matched to your soil, not to a marketing segment.
Everyone claims “premium”. Below is what that means with us, measurable and verifiable.
Every granule has a polymer coating that releases nutrients based on soil temperature, not rain, not the calendar. So no shocks, no burning, no waste. One application feeds for 8 to 12 weeks.
Our formulas grew out of 7 years of greenkeeping on professional golf courses, dosed for a family garden.
Spread an NPK mix without a soil analysis and you’re spreading blind. For €129 we put a stop to that: 20 measurements, from nitrogen, phosphorus and potassium to trace elements, pH and organic matter, followed by a written 2-year fertiliser plan (in Belgium and the Netherlands).
The coating releases only what the plant can take up, so far less washes through into groundwater, and a CRF-fed lawn needs noticeably less watering through summer.
Four weeks after your first order, our adviser calls you unprompted. Did the package work? Unsure about dosage? No call centre: the same people who give the advice also know your soil report.
For those who want to know why a Fertilize-it granule behaves differently. No marketing, just how CRF works.
Every granule gets a layer of biodegradable polymer. The thickness of that layer sets the release speed, thinner = faster, thicker = slower.
From 10 °C soil temperature, nutrients diffuse through the membrane, exactly when the grass takes them up. At 4 °C they wait in the granule. No waste on cold ground.
Classic NPK peaks in week 1 and is gone by week 4. CRF stays in the “safe zone”: enough to grow, too little to burn. 8 to 12 weeks straight.
Nutrients are released only when the grass needs them, so less than 8% leaches into groundwater. Classic NPK: 40–60%.
We have no interest in being unfair. Here’s everything, including where Fertilize-it loses.
*DGCI: Dark Green Color Index, measured across 80 lawns in independent field research, 2024-2025.
Mathieu De Lille, founder
More testing on different soils and grass types.
All test-proven products go to the European market.
