Root damage
Digging close to plants, wind rock, stony soil, pot-bound roots and root pests all cut a plant's water supply. The top wilts or stalls, and root crops fork or split where their tips were damaged.
Roots & damage
What it looks like
Above ground it looks like thirst; below ground is the story.
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Wilting in damp soil Leaves flag although the soil is moist. -
Rocking stems Tall brassicas and corn loosen at the base in wind, with a hollow round the stem. -
Forked roots Carrots and parsnips split into legs where the tip hit a stone or was damaged. -
Circling roots A pot-bound plant has roots wound round the pot and dries out fast.
How to confirm it
Look at the roots, gently.
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Recent disturbance
Digging, hoeing, repotting or a gale in the last week or two.
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Ease out a plant
Cut, crushed or circling roots confirm it; soft brown ones mean rot instead.
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Look for pests
Tunnels, maggots or swellings mean root flies, wireworm or clubroot.
What to do
Steady the plant and let new roots grow.
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Firm and stake
Firm the soil round rocking plants and earth up or stake tall ones.
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Water carefully
Keep the soil just moist while new roots form; do not drown it.
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Tease out pot-bound roots
Loosen circling roots and pot on one size up.
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Hand-weed close to plants
Pull weeds by hand near shallow-rooted crops rather than hoeing.
Prevent it next time
- Prepare a deep, stone-free bed for carrots and parsnips.
- Sow root crops where they are to grow; never transplant them.
- Plant brassicas firmly and stake in exposed spots.
- Pot plants on before roots circle.
What not to do
Do not feed a plant with damaged roots; wait for new growth.
In the growing guides
Where the guides mention it, with plant-specific advice.
Sources
- Carrot fly, Royal Horticultural Society
- Wind scorch, Royal Horticultural Society