Lawn Care

Grass is the hungriest crop in the garden

Cut it every week and it has to rebuild itself from the roots up, every time. This collection is the Dr Forest approach to feeding it: a high-nitrogen organic lawn feed as the base, a lawn wetting agent for ground that has stopped taking water, and the supporting cast for compacted, tired or stressed turf. It is lawn fertiliser UK-made, hand-blended in Stockport, with every ingredient named.

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Where to start

Organic Lawn Fertiliser 10-3-3.5 is the core of the programme. Nitrogen that releases gradually for steady colour and recovery, easy to spread, and gentle enough not to scorch when used as directed. For most lawns that one bag is the whole job. If you want to understand what the nitrogen is actually doing and when grass genuinely needs a lot of it, see when a lawn needs high nitrogen and when to stop.

On heavy or compacted clay, Liquid Gypsum works beneath the surface: micronised calcium sulphate that helps open soil structure without shifting pH. Feeding a lawn that water cannot get into is money poured away, so if yours puddles after rain, start here instead.

Lawn wetting agent: for dry patch and hydrophobic soil

A lawn wetting agent is a surfactant. It lowers the surface tension of water so it soaks into the root zone instead of beading and running off to the lowest corner of the lawn. That is the whole mechanism, and worth stating plainly: a lawn soil wetting agent is not a feed and will not thicken a thin sward on its own.

Dry patch is what most people are actually looking at when they search for a wetting agent for lawns: irregular areas that stay straw-coloured through a dry spell, feel hard underfoot, and shed water when you put a hose on them. The cause is hydrophobic soil — waxy residues from breaking-down organic matter and thatch coat the sand grains, and once a soil dries past a certain point water sits on top or finds a channel and disappears past the roots. Sandy and sandy-loam lawns get it worst, as does thin turf laid over builder's sand or rubble.

The Natural Wetting Agent is made with organic Indian soap nuts and aloe vera rather than a synthetic surfactant. It is a lawn wetting agent UK gardeners can buy direct from the people who blend it, in Stockport. Used as a wetting agent for grass it goes on as a drench through a watering can or sprayer, and works best on ground that has been aerated or spiked first. Dilution is on the product page, and wetting agent rates and coverage per square metre are set out separately.

There is no single best wetting agent for lawns, and we would be sceptical of anyone who claims otherwise. What matters is more ordinary than the marketing suggests: apply it to soil that can accept it, water it in properly, and repeat it. The effect sits in the top few centimetres and repellency returns as the soil dries again, so treat it as a summer routine rather than a one-off. The lawn wetting agent guide covers timing.

The supporting cast

• Soluble seaweed powder or Scottish kelp meal. Trace elements and natural biostimulants that help grass through drought and heat stress; how to apply seaweed fertiliser covers method and timing.
• Alfalfa meal pellets. Slow organic nitrogen that feeds the soil life keeping a lawn thick from below, though alfalfa on lawns comes with a caveat about its own strength.
• Natural wetting agent. Soap nuts and aloe vera, for the dry patches where water beads and runs off instead of soaking in. Most useful on sandy soil and through a hot summer. There is a particular kind of dry brown patch that rain does not fix, and this is how you deal with it.
• Liquid Lawn Feed 5-2-5. For a faster response mid-season, or where you would rather spray than spread; granular versus liquid lawn feed sets out when each one makes sense.
• Granulated gypsum and kieserite. Calcium and sulphur in granular form, and magnesium at 25% for lawns that look pale despite being well fed, which is one of several reasons a lawn turns yellow.

How to feed through the year

Feed from spring once the grass is actively growing, and again through the season as growth demands. Rates and frequencies are on each product page. Water in after spreading if rain is not forecast. Taper off in late autumn: feeding a lawn hard into winter pushes soft growth at the wrong time of year. Feeding a lawn the organic way works through the seasons in more detail.

When to feed lawn grass in spring

Spring lawn feed UK gardeners put down in February mostly goes to waste: the grass is barely growing, the soil is cold, and nitrogen a lawn cannot use either sits there or leaches. Wait for the soil to warm and growth to start — for much of the country, mid-March to late April, later in the north and on heavy ground. The first cut is a better signal than the calendar.

Summer

Through summer the limit is usually water, not nutrition. Feeding hard into drought stress asks the grass to grow when it cannot, so raise the mowing height and fix any infiltration problem before reaching for more nitrogen.

Autumn lawn feed and going into winter

Autumn lawn feed UK advice generally points away from nitrogen and towards root and crown condition, and that is sound. From September the aim is a lawn entering winter with good structure below ground rather than a flush of soft top growth. Ease the nitrogen off and keep working on compaction while the ground is still warm enough to respond.

Common questions

Which one do I actually need?

For most lawns, just the Organic Lawn Fertiliser 10-3-3.5. Add Liquid Gypsum if your soil is heavy clay or compacted, seaweed if the lawn struggles in summer heat, and the wetting agent if water runs off dry patches instead of soaking in.

Is a wetting agent the same as a lawn feed?

No, and they are not substitutes. The feed supplies nutrition. The wetting agent supplies none at all — it changes how water behaves in the soil. A hungry lawn needs the first. A lawn where the hose runs off and the ground stays dry underneath needs the second, often before the feed will do anything useful.

How do I know if my soil is hydrophobic?

Dig a small plug from a pale area after watering it well. If the surface is damp and the soil 30 mm down is dust dry, water is not getting in. Simpler still: put a hose on the patch and watch. Water that beads, sits or runs sideways has answered the question.

Will it scorch the grass?

Not when used at the stated rate. The nitrogen releases gradually rather than hitting the grass all at once, which is what causes scorch with soluble synthetic feeds. Spread evenly and water in if rain is not due.

When should I feed?

From spring, once the grass is actively growing, and through the season as it demands. Ease off in late autumn. Feeding hard into winter encourages soft growth when the lawn should be slowing down.

My lawn puddles after rain. What helps?

That is usually compaction rather than a feeding problem. Liquid Gypsum supplies calcium sulphate in micronised form, which helps flocculate heavy clay and open the structure so water and air can move through, without shifting soil pH the way lime would. Aerating first will get you more from it, and whether liquid gypsum is good for lawns is answered in full on its own page.

Is it safe around pets and children?

These feeds contain no synthetic salts. As with any fertiliser, keep pets and children off the lawn until it has been watered in and the granules have worked down into the sward. A natural, pet-safe lawn feeding plan sets out the whole year.

Can I use these anywhere else in the garden?

Yes. The gypsum, seaweed and alfalfa are general soil conditioners and work across beds, borders and the vegetable plot, as does the wetting agent, which sits alongside the rest of the plant soaps and wetting agents. Only the 10-3-3.5 is specifically balanced for grass: its high nitrogen suits leafy growth rather than flowering or fruiting crops. For those, see the crop-specific blends.