Causes & Solutions

My Lawn Won't Grow

Sown seed that never comes up, or a lawn that just won't thicken? When grass won't grow, the soil, seed or conditions are almost always to blame. Here's how to fix it.

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The Complete Guide

My Lawn Won't Grow

Few things are more frustrating than sowing grass seed and watching nothing happen - or nursing a lawn that stubbornly refuses to thicken up. Grass has a few basic needs: decent soil, enough light, water, warmth and the right seed. When it won't grow, one of those is missing.

This guide walks through every common reason grass fails to grow, how to tell which applies to you, and the steps to finally get a thick, healthy lawn established.

Common Causes

What's Causing the Problem?

Poor or Compacted Soil

Grass needs loose, fertile soil to root into. Compacted ground, heavy clay, or the poor subsoil left on new builds gives roots nothing to grow into, so seed struggles and existing grass stays thin.

Sowing at the Wrong Time

Grass seed needs warm, moist soil to germinate. Sowing in cold winter soil or the height of a dry summer usually fails - spring and early autumn are the reliable windows.

Too Much Shade

Standard grass won't grow in deep shade under trees or beside fences and buildings. Without enough light, it simply won't establish.

Wrong or Old Seed

Poor-quality or out-of-date seed germinates badly. The wrong seed for the conditions (e.g. a fine ornamental mix in a shady, high-wear garden) will also disappoint.

Not Enough Water

Newly sown seed must stay consistently moist. Let it dry out even once during germination and much of it will fail.

Seed Eaten or Washed Away

Birds eat uncovered seed, and heavy rain or watering too hard washes it into clumps or off the area entirely.

Underfeeding

Even established grass won't thicken without nutrients. An underfed lawn grows slowly and stays sparse.

How to Fix It

How to Solve It - Step by Step

1

Test and improve the soil

Loosen compacted ground by forking or aerating, and work in fresh topsoil or compost. On new builds especially, improving the poor subsoil is usually the difference between success and failure.

2

Sow at the right time

Aim for spring (April-May) or early autumn (September-October), when soil is warm and moist. Avoid frosty periods and peak summer drought.

3

Choose the right seed

Use fresh, good-quality seed suited to your garden - hard-wearing for family lawns, and a shade-tolerant mix for areas that don't get much sun.

4

Prepare a proper seed bed

Rake the soil to a fine, level tilth, remove stones and debris, firm it gently, then sow evenly at the recommended rate and lightly rake the seed in.

5

Keep it consistently moist

Water gently and often enough that the surface never dries out during germination - usually daily in dry weather until the grass is established.

6

Protect the seed

Cover with a thin layer of soil or use netting to deter birds, and water gently so seed isn't washed away.

7

Feed to thicken an established lawn

For a thin but living lawn, aerate, scarify out thatch and moss, overseed, and feed with a seasonal fertiliser to encourage dense, healthy growth.

Quick Checklist
  • Loosen and improve compacted or poor soil before sowing
  • Sow in spring or early autumn, never in cold or drought
  • Use fresh, good-quality seed suited to your conditions
  • Rake a fine, level seed bed and sow at the right rate
  • Keep the surface consistently moist during germination
  • Protect seed from birds and feed an established lawn to thicken it

Want a Lawn That Actually Grows?

If seed will not take, the soil is usually the problem. We assess and correct it, then either overseed or lay fresh turf for an instant, established lawn. See our turf laying in Basingstoke.

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Common Questions

Frequently Asked Questions

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