How to Feed Your Lawn: Dosage, Timing and What Each Nutrient Does
Feed an existing lawn with 1 kg of Lawn Fertiliser All-In-One per 20 m² (50 g/m²), three times a year: in spring, summer and autumn, between March and October. For a new lawn, rake 1 kg per 10 m² into the soil at sowing. Spread evenly with a spreader or by hand, apply before rain or water afterwards, and wait 5 days before mowing or intensive use. The amounts are a guideline: grass type, soil, climate and the nutrient status of the soil determine the right dose.
Lawn Fertiliser All-In-One is an organic-mineral microgranulate, NPK (Mg) 9-2-7 (+3), with added lime, rock meal and a blend of minerals and trace elements to strengthen the turf. It is used on garden lawns, sports fields and golf courses, for new lawns as well as maintenance. This guide covers dosage, the feeding calendar, spreading, what each nutrient does and the most common mistakes.
What does an all-in-one lawn fertiliser do?
It feeds the grass and the soil in one application: fast and slow-release nutrients for the turf, lime and rock meal for the soil, and minerals and trace elements to strengthen the grass.
The fast-acting part gives the grass a quick start. The slow-release part is released gradually by soil life, for up to 100 days. The organic matter stimulates soil life and humus formation, which improves root penetration and helps prevent nutrients from leaching. The result can be a denser, stronger turf that leaves less room for moss and weeds.
How much lawn fertiliser do you need per m²?
For maintenance 1 kg per 20 m² (50 g/m²) per application; for a new lawn 1 kg per 10 m² (100 g/m²), worked into the soil.
|
Situation |
Amount (guideline) |
How |
|
Existing lawn, sports field, golf course |
1 kg per 20 m² (50 g/m²), 3× per year |
Spread evenly in spring, summer and autumn, between March and October |
|
New lawn |
1 kg per 10 m² (100 g/m²) |
Rake lightly or work into the soil at sowing |
|
Bare or thin patches |
1 kg per 10 m² on the overseeded spots |
Overseed first, then rake the fertiliser in lightly |
|
Pack size |
Area per application at 50 g/m² |
|
5 kg |
100 m² |
|
10 kg |
200 m² |
|
20 kg |
400 m² |
|
10 × 20 kg (200 kg) |
4,000 m² |
|
20 × 20 kg (400 kg) |
8,000 m² |
|
40 × 20 kg (800 kg) |
16,000 m² |
|
Big bag 1000 kg |
20,000 m² |
For three applications a year, multiply the amount by three: a 400 m² lawn needs 3 × 20 kg per year. The recommended amounts depend on grass type, soil type, climate and the fertilisation status of the soil. On sports fields, golf courses and large areas, base the dose on a soil analysis.
Featured products in this guide
Lawn Fertiliser All-In-One(20 kg - for 400 m2)
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Scarifying Mix - Grass Seed - Fertiliser - Soil Conditioner (15 kg - for 450 m2)
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Lawn Topdressing - Mix with Mycorrhiza and Rhizobacteria (50 Litres - for 50 m2)
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When should you feed the lawn?
Three times a year between March and October: in spring, in summer and in autumn. Each feed provides up to 100 days of nutrition.
Spring: When the grass starts growing. If needed, scarify first and overseed thin spots with Scarifying Mix or Lawn Repair Seed – Resilient, so the fertiliser reaches the soil and supports the new grass.
Summer: About 100 days later. In a dry period, water after spreading so the nutrients can move into the soil.
Autumn: In time for the turf to strengthen before winter. The potassium supports resilience against frost and wear.
Feed on soil that is neither frozen nor waterlogged. Apply before rain is expected or water afterwards. After fertilising, wait 5 days before mowing or using the lawn intensively.
How do you spread lawn fertiliser evenly?
Use a spreader or spread by hand, check the setting and working width, and spread half the dose lengthwise and half across.
Spreader or by hand: The dust-free microgranulate spreads evenly with a drop or rotary spreader. On small areas you can spread by hand.
Check the setting: Test the spreader on a measured strip and weigh what comes out. Compare it with 50 g per m² and adjust before you start on the whole area.
Two directions: Divide the dose into two halves and spread them crosswise. This prevents stripes of darker and lighter grass.
Overlap: Keep to the working width of the spreader, so the strips overlap without double dosing.
Dry or wet lawn: The fertiliser can be applied to a dry or a wet lawn. The fine granules fall between the grass and are soon no longer visible.
What does each nutrient do in the turf?
Nitrogen drives growth and colour, potassium strengthens the grass against drought, frost and wear, and magnesium gives the deep green colour. Lime and soil life work on the soil.
Nitrogen (9% N): Drives leaf growth and colour. Part acts quickly; the organic part is released gradually by soil life, faster in warm, moist soil and slower in cold or dry soil.
Phosphate (2% P₂O₅): Supports root development, especially in young grass.
Potassium (7% K₂O): Regulates the water balance and strengthens the cell walls. It supports resistance to drought, frost and wear.
Magnesium (3% MgO): The central element of chlorophyll. It gives the deep green colour, without iron sulphate.
Lime and rock meal: Help keep the soil's acidity in balance and supply minerals and trace elements.
Reading the figures: The percentages are by weight, and phosphate, potassium and magnesium are expressed as oxides. At 50 g/m², one application supplies about 4.5 g nitrogen, 1 g phosphate, 3.5 g potassium oxide and 1.5 g magnesium oxide per m².
Pale, yellow-green grass that grows slowly often points to a nitrogen shortage; yellowing between the veins of older leaves can point to magnesium. These signs overlap with compaction, drought, shade and wear, so a soil analysis tells you which one applies.
Do you still need lime or a moss killer?
For routine maintenance usually no separate lime, because the fertiliser contains lime. It contains no iron sulphate, so it does not kill existing moss.
If a soil analysis shows a low pH, plan additional liming as a separate application and never mix lime and fertiliser in the spreader. Less moss alone is not a reliable sign that the pH is right. Because there is no iron sulphate, the fertiliser does not stain paving. Remove thick moss by scarifying; a dense, well-fed turf then leaves less room for moss and weeds.
Is it different for sports fields and golf courses?
The product is the same; the dose and timing follow the use and a soil analysis.
Garden lawns: Three feeds a year at 50 g/m², combined with scarifying and overseeding in spring where needed.
Sports fields: Three feeds a year, with extra attention to worn areas such as goalmouths. A stronger turf is more resilient to trampling damage.
Golf courses: Base the dose on soil analysis per zone. The fine microgranulate also disappears in short, fine turf, so the fertiliser is not visible.
Soil analysis: Compare results with earlier analyses, test different zones separately and always sample at the same depth. Record when and how much you applied.
What are the most common mistakes?
Uneven spreading, feeding in a dry period without water, and mowing too soon: in all three cases the turf does not get the full benefit.
Uneven spreading: Spreading in one direction without checking the setting causes stripes.
Too much at once: More than the guideline does not give a better result and increases the risk of leaching.
No water in a dry period: The nutrients stay on the surface instead of moving into the soil.
Mowing too soon: Wait 5 days after fertilising before mowing or intensive use.
Mixing in the spreader: Mixing with lime or other fertilisers instead of planning separate applications.
Mowing too short: A slightly longer leaf supports deeper rooting; remove no more than about a third of the leaf length at a time.
How do you store lawn fertiliser?
Kept cool, dry and out of direct sunlight, Lawn Fertiliser All-In-One keeps for up to 2 years without loss of quality. Close opened bags well.
In short: feed 50 g per m² three times a year between March and October, spread evenly in two directions, apply before rain or water afterwards, and wait 5 days before mowing. For advice on your area, send us your soil type, the use and, if available, a recent soil analysis.
|
Product |
What it does in this job, and when you need it |
|
Organic-mineral NPK (Mg) 9-2-7 (+3) with lime, rock meal and turf strengthener. Up to 100 days of nutrition per feed. 50 g/m² for maintenance, 100 g/m² for a new lawn. From 5 kg (100 m²) to a 1000 kg big bag (20,000 m²). |
|
|
Grass seed, organic fertiliser and soil improver in one, for overseeding after scarifying in spring. 30–40 g per m², March to October. |
|
|
Living soil conditioner with mycorrhizal fungi, Bacillus and Azotobacter. Adds organic matter alongside the fertiliser, as a separate application. Max. 1 litre per m² on existing turf. |
