Autumn Fertilization: Why a Coated Fertilizer Makes the Biggest Difference Now

The last application of the year may well be the most important one. The turf has to get through the entire winter on it, while conditions move in exactly the wrong direction. Temperatures drop, growth slows down and rainfall increases.

That is the moment when the real value of a fertilizer becomes visible. Because a granule that releases everything at once will do so even when the grass cannot use it.

Autumn is the most demanding feeding moment of the year

In spring and summer the grass grows fast. Nutrients that become available are taken up almost immediately. There is room for error.

In autumn that room disappears. The uptake capacity of the plant declines, while the risk of loss increases. So the question is not only how much you apply, but above all how and when those nutrients become available.

Release that follows temperature

Temperature-driven release

See how soil temperature influences nutrient release

Adjust the soil temperature and compare how a Durable® coated fertilizer releases nutrients gradually, while a conventional fast-acting fertilizer makes nutrients available much faster.

Soil temperature Move the slider to simulate conditions

11 °C

0 °C 5 °C 10 °C 15 °C 20 °C 25 °C

Nutrient release after application

Controlled release active

Durable® coated fertilizer

Conventional fertilizer

Durable® coated

Estimated nutrient release after 4 weeks

Conventional

Estimated nutrient release after 4 weeks

Autumn conditions

As soil temperatures decrease, nutrient release from the coated granule slows down as well. This helps align nutrient availability more closely with plant activity.

Illustrative representation of the nutrient release principle. Actual release depends on product formulation, specified longevity, soil temperature, moisture and local growing conditions.

With Durable® coating technology from Mivena, nutrients are released in a controlled and gradual way. That release is largely driven by temperature.

As long as soil temperature is high enough and the grass is still actively growing, nutrients keep becoming available. When temperature drops and growth slows, the release slows down as well.

Feeding therefore matches the actual demand of the grass far more closely. The fertilizer effectively moves along with the season.

No unwanted nutrient peak in the final autumn application

With a fast acting conventional fertilizer, a large share of the nutrients becomes available shortly after application.

Late in the season this can work against you. Growth is slowing down and so is the demand for nitrogen. A large volume of directly available nutrition is then used less efficiently.

A Durable® coated fertilizer prevents that sharp peak. Nutrients become available gradually and follow the activity of the plant. The grass is fed when it can actually use the nutrition, without forcing an unnecessary flush at the end of the season.

Lower risk of leaching

In autumn and winter the risk of leaching increases. Rainfall is higher, while nutrient uptake by the grass is lower.

With Durable®, a significant part of the nutrition stays protected inside the coating and is only released gradually. This helps to limit losses and keeps more of the applied nutrition available to the turf.

Less loss ultimately means a more efficient use of every kilogram of fertilizer.

Performance from autumn into early spring

One of the biggest advantages of a coated fertilizer is its long working period. Depending on the product and the conditions, an autumn application can continue to supply nutrition over an extended period.

Autumn → winter → early spring

When temperatures are low during winter, release slows down considerably. As soon as temperatures rise again in spring, release picks up.

The grass is fed in autumn while there is still growth, release is limited during cold spells, and nutrition becomes available again in early spring as soon as growth resumes.

High potassium: ideal heading into winter

For autumn and winter feeding, formulations with a relatively high potassium content are particularly interesting. Potassium plays an important role in:

This is why Granucote® and GreenStar® with a high potassium content are very well suited for applications heading into winter.

Formulations with an N:K ratio of roughly 1:2 supply enough nitrogen for controlled growth, combined with extra potassium to take the plant into winter strong and vital.

Why coating matters most in this period

A high quality coated fertilizer offers benefits all year round. But nowhere do the properties of Durable® come together as clearly as in the autumn and winter period:

Frequently asked questions

As long as the grass still shows active growth and the soil temperature is sufficient. With a coated fertilizer, timing is less critical because nutrient release adapts to temperature.

A fast-acting fertilizer releases most of its nutrients shortly after application. A coated fertilizer releases nutrients gradually, with the release rate primarily driven by temperature.

Potassium supports water regulation, cell strength, stress tolerance and winter hardiness, helping the grass plant prepare for colder and more stressful conditions.

Yes. At low temperatures, nutrient release slows down considerably. As soil temperatures rise again in early spring, release gradually increases and the remaining nutrients become available to the grass.

Choose on timing, not just on quantity

For the final application of the year, the question is not how much nutrition is in the bag, but when that nutrition reaches the plant.

With Durable® you choose a feeding programme that adapts to the conditions and supports the turf from autumn well into the new season.

Controlled nutrition when the grass needs it most.

Wondering which formulation fits your turf and season best? Get in touch with Mivena or explore the Granucote® and GreenStar® range.