How to Control Nettles, Brambles and Self-Seeded Trees

Why Nettles, Brambles and Self-Seeded Trees Are a Problem

Nettles, brambles and self-seeded trees are the three most common weeds in Chiltern gardens. They spread by seed (bird-dropped), by root, and by suckering. A garden that is neglected for a single season can be overrun within 12 months. The combination of fertile soil, semi-shade, and bird-dropped seed makes the Chilterns particularly prone to these weeds.

The good news is that all three can be controlled with consistent effort. The key is to dig out the roots, not just cut the tops, and to monitor regularly for regrowth. This guide explains how to control nettles, brambles and self-seeded trees in Chiltern gardens.

How to Control Nettles

Nettles (Urtica dioica) are perennial weeds with creeping roots. They spread by seed and by root, and can form dense patches within a single season. Nettles are actually valuable for wildlife (they support peacock, small tortoiseshell, red admiral and comma butterfly caterpillars), so consider keeping a small patch in a corner of the garden.

Method 1: Dig Out the Roots

1. Wear thick gloves and long sleeves (nettles sting).
2. Cut the tops off with shears.
3. Dig out the roots with a fork. Nettle roots are yellowish and creeping. Get every bit.
4. Sieve the soil to remove small root fragments.
5. Check monthly for regrowth and dig out any new shoots.

This method takes 1 to 2 years to fully control a nettle patch.

Method 2: Smother

1. Cut the nettles to ground level.
2. Lay thick cardboard over the area, overlapping by 30cm.
3. Cover with a 10cm layer of bark or compost.
4. Leave for 12 months.

Method 3: Glyphosate

Spray with glyphosate in June when the nettles are in full growth. They will die in 3 to 4 weeks. Dig out the dead roots.

How to Control Brambles

Brambles (Rubus fruticosus) are woody shrubs with thorny stems. They spread by seed, by tip-rooting (stems root where they touch the ground), and by suckering from the root crown. See our full bramble clearance guide for detail.

The Bramble Clearance Process

1. Cut the top growth to ground level with a brush cutter or loppers.
2. Dig out every root crown with a mattock. Go 15 to 20cm deep.
3. Rake up all debris. Bramble stems root where they touch the ground.
4. Monitor for regrowth every 2 weeks for the first 3 months.
5. Treat stubborn regrowth with glyphosate in late summer.

How to Control Self-Seeded Trees

Self-seeded trees (sycamore, ash, birch, holly, yew) are a common problem in Chiltern gardens. Birds drop seeds, and within a few years you have a 2 metre tree growing through your patio or fence. The key is to remove them when small, before the roots get established.

Small seedlings (under 30cm)

Pull by hand. Get the whole root. If the root breaks, dig out the remaining piece.

Medium saplings (30cm to 1.5m)

1. Cut the sapling to ground level.
2. Dig out the root with a fork or spade.
3. Fill the hole with soil and firm.

Large saplings (over 1.5m)

1. Cut the sapling to ground level.
2. Drill holes in the cut stump.
3. Apply glyphosate (or a dedicated stump killer) to the holes.
4. Wait 4 to 6 weeks for the root to die.
5. Dig out the dead root if you want to plant in the same spot.

For very large trees, you may need a tree surgeon. See our clearance service.

How to Prevent Regrowth

• Mulch thickly after clearing. A 10cm layer of bark or compost suppresses seed germination.
• Plant the area with ground cover plants. Bare soil is an invitation for weeds.
• Monitor weekly for the first year. Pull any seedlings when small.
• Check the boundaries where weeds may spread from neighbouring land.
• Remove bird perches (dead trees, large shrubs) where birds drop seeds.

The Cost of Controlling Nettles, Brambles and Self-Seeded Trees

Common Mistakes

• Cutting without digging. Cutting the tops leaves the roots, which regrow. Always dig out the roots.
• Composting the roots. Compost heaps do not kill nettle and bramble roots. Burn them or put them in the bin.
• Not monitoring for regrowth. Any root fragment left in the soil will regrow. Check weekly for the first year.
• Not replanting after clearance. Bare soil is an invitation for weeds. Plant ground cover after clearing.
• Letting self-seeded trees get too big. Pull seedlings when small. A 30cm sapling is easy, a 3 metre tree is a major job.

Frequently Asked Questions

Should I keep a patch of nettles for wildlife?

Yes, if you can. Nettles support peacock, small tortoiseshell, red admiral and comma butterfly caterpillars. Keep a small patch in a designated corner.

Will glyphosate kill my other plants?

Glyphosate will kill any plant it touches. Use carefully, on a calm day, and protect desirable plants with plastic sheeting.

How do I stop self-seeded trees coming back?

Remove bird perches (dead trees, large shrubs) where birds drop seeds. Mulch thickly. Monitor weekly and pull seedlings when small.

Get Help with Weed Control

If you have nettles, brambles or self-seeded trees in Oxfordshire, Buckinghamshire, Berkshire or Bedfordshire, send us a WhatsApp with photos and we will aim to respond within 12 to 36 hours, Monday to Sunday.

Further Reading

• How to clear brambles properly
• Dealing with brambles in an overgrown garden
• Our garden clearance service

Sources and citations

This article draws on the following sources. Specific claims are cited inline where relevant.

1. CGM field records (2024-06. Site observations from gardens across Oxfordshire, Buckinghamshire, Berkshire and Bedfordshire.
2. Royal Horticultural Society (2024). RHS Gardening Advice and Plant Finder. Available at rhs.org.uk.
3. Met Office (2024). Regional climate averages, South East England. Available at metoffice.gov.uk.
4. British Geological Survey (2024). Soil parent material data for the Chilterns and Thames Valley. Available at bgs.ac.uk.