Carrot root fly is a troublesome pest but these Carrot fly resistant varieties have low levels of chlorogenic acid, a chemical which the carrot fly larvae of needs to survive. This means that they appear to be unattractive to the fly and even if your crop is attacked the larvae will soon die after doing relatively little damage. Height: 30cm (12"). Spread: 15cm (6").
Direct sow carrot seeds outdoors from March to July. Early varieties may also be sown from February to March in greenhouse borders or under cloches. Specific autumn sowing carrot varieties can be sown as late as October under cloches for an early crop in spring. Grow Carrots in a weed free, sunny position in fertile, light, well drained soil. Carrots dislike freshly manured soils so seed beds are best prepared in autumn, well in advance of spring sowings.
Sow carrot seeds thinly at a depth of 1cm (½in) in drills 30cm (12") apart. Germination will take 10 to 20 days. When large enough to handle, thin out the seedlings within each row to 10cm (4in) apart. Where space is limited, growing carrots in containers will also produce a worthwhile crop.
Water well to encourage germination. Once germinated, carrots should be watered only when necessary to keep the soil moist as excessive water may encourage leaf growth instead of roots. During growth, the carrot roots may be earthed up to prevent green crowns developing.
Cover later carrot sowings with fleece or fine netting, and remove all thinnings from the site to minimise carrot fly infestation. Carrots can be harvested from July to December depending on their sowing date. Early varieties may be lifted when required from 9 weeks onwards, while maincrops can be harvested after 11 weeks from their sowing date. Pull a single carrot first to assess the size of the roots. If the soil is dry, lifting carrots can be made easier by watering beforehand. Roots can be stored in a cool, dry place for up to 4 months.
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