Carrot

Origin & history

The carrot descends from the wild carrot that grows on our roadsides and dry meadows — its white umbel often carries a single dark red floret right in the middle. It reached Europe as a crop via Persia and Afghanistan, back then in purple, yellow and white; the orange carrot only took over in the 16th and 17th centuries through Dutch breeding and then pushed all other colours aside. Botanically it is an umbellifer and thus a close relative of parsnip, celeriac and parsley — which matters for crop rotation.

Varieties

The variety types differ mainly in root shape: Nantes types are cylindrical and blunt-ended and the standard for a garden bed, round Paris and short Amsterdam types are fast earlies, Chantenay types stay short and conical and cope with heavy or stony ground, and long Berlikum and Flakkee types are the storage carrots for deep sandy soil. If your soil is shallow or clayey, deliberately pick a short type rather than a long variety — that helps more in the first year than any amount of soil improvement. Some varieties are explicitly listed as less prone to carrot fly; F1 varieties come up more evenly, while open-pollinated ones are perfectly adequate in a home garden.

Care

The real work is thinning: at 3–4 cm tall thin to 4–5 cm apart, otherwise every root stays thin. Pull the seedlings on a damp evening and take them away with you — it is the smell of the bruised leaves that draws carrot fly in. No fresh manure and no heavy nitrogen: that gives lush foliage and forked, legged roots. Once the shoulders push out of the soil, draw a little earth over them or they turn green and bitter.

What can go wrong

The main damage comes from carrot fly: the larvae eat rusty brown tunnels just under the skin. It flies low, so fine-mesh insect netting from the day of sowing, laid tight at the edges, helps more than anything else; sowing only from mid-May onwards dodges the first generation. Do not bring carrots back to the same bed for three to four years and do not follow parsnip, celeriac or parsley, or nematodes and Alternaria leaf blight build up. Forked roots almost always come from stones, from a compacted layer in the subsoil or from fresh manure — not from the variety.

Harvest, storage & kitchen

They are ready when the shoulder measures about 3 cm; for a winter store leave them standing into October. Take the foliage off immediately after lifting, otherwise it keeps drawing water out of the root — do not wash them, just rub the soil off and pack them unwashed in damp sand in a box in a cool cellar, where they keep into spring. Do not store them next to apples: the ethylene apples give off turns carrots bitter.

Frequently asked questions

When do you sow carrots?

Straight into the bed from mid-March to the end of June, ideally in several small batches rather than all at once. Raising them in pots is not worth it: the taproot resents disturbance and forks afterwards.

Are carrots winter hardy?

Not really. They take light autumn frost in the ground and even sweeten from it, but a bed that freezes through leaves the roots mushy. So clear the row by mid-November, or cover it with a thick layer of leaves.

Why are my carrots flowering in their first year?

Because the young plants hit a longer cold spell — carrots are biennial and would normally flower only in year two. The root goes pale and woody as it happens. Pull the affected plants and let the rest of the row carry on.

Can I grow carrots in a container?

Yes, as long as the pot is at least 30 cm deep and has drainage holes — a shallow window box will not do. Choose short conical or round types instead of long keeping carrots, and water evenly, because compost in a pot dries out fast.