How to grow carrots

Inspired by a helpful YouTube guide. This walk-through draws on the popular GrowVeg video "Growing Carrots from Sowing to Harvest", which covers variety selection, soil preparation, sowing technique, and harvest timing with the practical, no-fuss approach GrowVeg is known for. Worth watching before you pick up your seed packets.

1. Pick the right variety for your soil

If your soil is shallow or stony, short-rooted varieties like Chantenay or Parmex are forgiving. They fatten into chunky stumps rather than straining to go deep. Long varieties such as Nantes or Autumn King need a proper run of loose soil to reach their full length.

Sandy, free-draining soils in Kent tend to suit carrots well. Clay is harder work — you would need to build in a lot of grit or grow in raised beds to make it worthwhile.

2. Prepare a deep, stone-free bed

Fork the bed over to at least 30cm and remove every stone you can find. Even a small pebble will split a carrot root. If you added fresh manure or compost recently, let the bed settle for a season — fresh organic matter causes roots to fork in two.

Avoid adding fertiliser before sowing. Carrots do not need rich soil and too much nitrogen pushes leafy top growth at the expense of the root.

3. Sow thinly directly into drills

Sow from March through to July for a succession of crops. Draw shallow drills about 1cm deep and 30cm apart. Sprinkle seed as sparingly as you can manage — carrot seed is tiny, so a light touch takes practice.

Cover with fine soil and water gently. Germination can take two to three weeks, so do not give up. If the bed dries out before seedlings appear, it will set them back considerably.

4. Thin seedlings promptly

Once seedlings are a few centimetres tall, thin to about 5cm apart. Do this in the evening and firm the soil back around any remaining plants straight afterwards. Disturbed soil releases a scent that attracts carrot fly, which lays its eggs right at the base of your plants.

Do not leave the thinnings lying around. Put them in the compost bin or sealed bag immediately — again, the smell.

5. Protect against carrot fly

Carrot fly is the main pest. The larvae tunnel through roots and ruin them. The fly cannot get above roughly 60cm, so a fine mesh barrier of that height around the bed is genuinely effective. Enviromesh or horticultural fleece pinned tightly around the edges works well.

Sowing later in the season (after mid-May) also helps, as it misses the first generation of flies. That said, a physical barrier is the most reliable method.

6. Water and weed, then harvest

Keep the bed weed-free. Weeds compete hard with young carrots and, once the foliage touches the ground, slugs move in. Water in dry spells but avoid alternating very dry and very wet conditions — that causes roots to split.

Harvest when the roots are the size you want. Gently loosen the soil with a fork before pulling. Left in the ground, most varieties will stand through an autumn frost, which actually sweetens the flavour.

When to call a handyman

Growing carrots is very much a DIY job, but if you need help building raised beds, improving garden drainage, or clearing a patch to create a proper kitchen garden, Richard can help with the groundwork. Getting the bed right is more than half the battle.