Lawnsmith Extra-Long Fertiliser for Clay Soil

Key Features
Spring application for 5-6 month slow release feeding
Perfect if you only want to feed once or twice a year
Green grass & gentle growth in Spring and Summer

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Make light work with these Spreaders



Application Rates

  • Typical application rate: 2.5-3.5 kilos per 100m2
  • Enhanced rate for improved growth & greening: 3.5-4.5 kilos per 100m2

Directions for Use

  • This is a granular product to be applied by spreader or by hand
  • Lawn Fertiliser for clay loam to dark, heavy or clay based soils
  • No watering required if soil moisture available
  • Can be applied before or after rain
  • For best result apply between March and end of May
  • For improved winter appeal partner with AUTUMN lawn food
  • Will not cause staining to hard surfaces
  • Lawn may be used immediately after application

Lawn Fertiliser Analysis NPK: 26-0-12

  • 26% Nitrogen, 0% Phosphate, 12% Potassium
  • Zero phosphate for clay, rich or organic soils
  • Potassium for improved moisture control and drought tolerance
  • 1.5% magnesium for colour and health
  • 70% very slow release nitrogen for 5-6 month trickle feeding
  • 30% quick release nitrogen for immediate results without excess mowing

Buying Guides


Season for Application
Early Spring, Late Spring,
Intended Use
Feeding the Lawn
Lawn Safety after Treatment
None hazardous for children, dogs and cats, Pets that eat grass/weeds to be kept off for 3 cuts,
Soil Type
Lasts for
Extra Slow 20-24 weeks
Method of Application
By hand or spreader
Nutrient Content
Nitrogen, Potassium, Magnesium,
Granule Size
2 to 3mm
Size and Coverage
2.5Kg Bag covers 85m2, 5Kg Bag covers 170m2, 10Kg Bag covers 330m2, 20Kg Bag covers 670m2,
Product Type

Customer reviews

4.7 / 5
173 reviews for Lawnsmith Extra-Long Fertiliser for Clay Soil
eKomi customer reviews
Martin Flay
Well packaged and good price.
Rated 5 out of 5
David Falconer
Used in spring as soon as the weather improves and the grass has had an opportunity to drain after the long wet winters we now have. Again have told neighbours. I find this feed is ideal for the conditions I experience with heavy clay, poor drainage and sometimes no sun for weeks. The best my grass has been was when we had the dry summer 2 years ago
Rated 5 out of 5
Stephen Wright
Gives great results
Rated 5 out of 5
Beverley Shackleton
I put on with a hand spreader which I find best as I have 4 smallish lawns. Keeps lawns green and weed free.
Rated 5 out of 5
martin Allen
Having scarified and over seeded my lawn at the beginning of September I applied a fast-acting fertiliser to help the grass recover. As advised, I will apply the Extra-Long Fertilizer for Clay Soil at the end of September to feed the lawn through autumn/winter. I am confident the product will reach The Lawnsmiths exacting standards once applied.
Rated 5 out of 5