Eleanor Hartley
Why Bare Patches Appear in Family Lawns
A lawn that gets used is a lawn that gets worn. Football goals, paddling pools, the washing line, a bike dropped on the same spot every afternoon — all of it takes a toll, and bare patches are the honest result. They are not a sign that you have failed as a gardener; they are a sign that your garden is doing its job.
That said, it helps to know what caused the damage before you reach for the seed. Most patches are simply worn out: the grass plants have been squashed and the soil beneath them compacted, so roots cannot get the air and water they need. Others come from drought, deep shade, a spilled bucket of weedkiller, a mower set too low, or a dog that has taken a dislike to one particular corner. If the patch is a perfect circle of dead grass with the soil lifted like a loose carpet, chafer grubs or leatherjackets are probably at work, and it is worth lifting the turf and removing them before you sow.
Whatever the cause, the repair follows the same steps: clear, loosen, sow, water.
Pick Your Moment
Timing matters more than technique. In the UK, early September to mid-October is the best window of the year. The soil is still warm from summer, the air is cooling, and rain usually arrives to help you. Late March to mid-April is the second best. Avoid sowing during a dry spell, when the ground is frozen, or when it is waterlogged.
Autumn sowing has a quiet advantage: the new grass puts down roots before winter, then gets away quickly in spring and outcompetes moss and weeds before they get a foothold.
Rake, Clear and Loosen the Soil
Start with a spring-tined rake and work over the patch and a little beyond it, pulling out dead grass, moss, thatch, leaves and anything that has been trodden in. Then look at what you are left with.
- Pull any weeds by hand, roots and all — dandelions and docks especially. If you use a weedkiller, wait the full period stated on the label before sowing.
- Fork over the top 5–8cm with a hand fork, breaking up clods as you go. This is the step most people skip, and it is the one that makes the difference.
- Work in a bucket or two of garden compost or topsoil if the soil is thin, stony or pale.
- Firm it gently with your heel or a piece of board. You want a surface that does not sink when you stand on it, but is not concrete either.
- Rake level, then leave it to settle for a few days if you can.
Choose Seed That Matches Your Lawn
The secret to an invisible repair is matching the seed to what is already growing. Look closely at your lawn. If it is a hard-wearing family lawn that shrugs off football and winter, it is almost certainly ryegrass-based. If it is fine, soft and dense, it is likely to be fescue and bent. Sow the wrong type and you will end up with a patch that is a different colour, texture and growth rate — visible from the kitchen window.
Buy a small bag of seed described for the job rather than the cheapest general mix, and check the species list on the back. For most family gardens, a ryegrass-dominant mix is the sensible choice: it germinates quickly, wears well and blends with what is already there.
For bare soil, sow at roughly 25–35g per square metre. For thickening a thin but living lawn, 15–20g is plenty. A useful trick is to mix the seed with two or three handfuls of dry compost or sand in a bucket. It bulks out the mix so you can see where it lands, and it shows up any streaks you have missed. Scatter half in one direction, half at right angles, then rake lightly so the seed sits roughly 5–10mm deep. Any deeper and it will struggle to germinate.
Sow, Cover and Keep It Moist
This is where repairs succeed or fail. Water gently with a fine rose or a watering can, and keep the top 2–3cm of soil moist — not soaked — for the first few weeks. In warm weather that means watering morning and evening; in cool, damp autumn weather, once a day or every other day may be enough. Two light waterings are far better than one flood that runs off and takes the seed with it.
Ryegrass usually germinates in 7–14 days. Fescue can take 14–21. Try not to panic at day ten.
Birds love grass seed, so lay horticultural fleece or netting over the patch on canes until the grass is up. Keep children and pets off it with a temporary barrier of canes and string — a couple of weeks is usually enough. If your family cannot spare the space, repair one patch at a time and rotate around the lawn rather than doing the lot at once.
If a dry spell hits, water in the evening so less is lost to evaporation. Slugs can nibble young seedlings, so check the patch on damp mornings and deal with any you find.
The First Cut and Beyond
When the new grass reaches 5–7cm, give it its first cut with a sharp blade on the highest setting, taking off no more than a third of the height. Cut it slightly longer than the rest of the lawn for the first few weeks while it builds strength. Once it has been cut three or four times, you can bring it into your normal mowing routine.
A thin topdressing of compost raked over the patch after the first cut helps it knit into the surrounding lawn and fills any small dips. Avoid weed and feed on new grass until it has been cut several times — usually a couple of months — as the young plants are easily scorched.
None of this is difficult, but it does reward patience. Give a bare patch decent soil, the right seed and steady moisture, and within a month you will struggle to remember where it was.
