Worms are indicators of healthy soil, not a cure for poor soil.

They establish and multiply only when the environment suits them.

If the conditions are right, they will survive, breed, and spread.
If not, they will move away or disappear.

Before introducing worms, check that your soil offers:

Moisture

Damp but not waterlogged. Think wrung-out sponge.

Temperature

Active above 10°C, ideal between 15–25°C.

Oxygen

Loose, aerated soil. Not compacted or anaerobic.

Organic matter

A steady supply of mulch, compost, leaves, or residues.

pH

Neutral to slightly acidic soils (roughly pH 6–7.5).

Specific Needs of Lumbricus terrestris

These deep-burrowing worms require:

• Undisturbed soil structure
• Surface mulch or organic matter
• Moist subsoil
• Minimal digging or cultivation

They live in permanent burrows and come to the surface at night to feed.

As a general guide:

Light introduction
25–50 worms per square metre
For healthy soils needing a boost.

Soil improvement
50–100 worms per square metre
For compacted lawns, tired beds, or new gardens.

Raised beds or intensive areas
50 garden worms per bed
Combined with composting worms in the top layer.

Remember:
If the conditions are right, they will multiply naturally.

Adding worms is like inviting guests to stay — they’ll only stick around if the home is right.

Prepare the soil Add compost, leaf mould, or mulch. Loosen compacted areas with a fork.

Water lightly Soil should be moist, not soggy.

Introduce worms in cool conditions Evening or a cloudy day is best.

Place worms into small holes About mug-sized holes every square metre.
Add 5–8 worms per hole with a handful of compost.

Cover and mulch Replace the soil and add a mulch layer on top.

Keep soil moist for a few weeks This helps them settle in and build burrows.

Avoid digging Frequent cultivation destroys their tunnels.

Quick Garden Checklist

Before adding worms, make sure:

• Soil is moist, not dry or compacted
• There is visible organic matter or mulch
• Soil is not regularly dug or tilled
• pH is roughly between 6 and 7.5
• Temperature is above 10°C

If you tick these boxes, your worms are far more likely to stay.

From Our Farm to Your Garden

At Lower Blakemere Farm in Herefordshire, worms are central to everything we do.

They help cycle nutrients, build soil structure, feed wildlife, and support the regenerative systems that grow our crops and feed our cattle.

When you add worms to your garden, you’re not just improving soil — you’re joining a bigger movement toward healthier, living ground.

Wiggly Tip

If you see worm casts after rain, celebrate.
That’s the sign of a living, breathing soil.