Skip to site navigation

Important notice: by continuing to use our site you are deemed to have accepted our privacy and cookie policy

Join over 55,000 other growers

Sign up for the monthly newsletter

Celery

Advertise here
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Introduction

The wild celery plant - from which cultivated varieties are selected - is found on boggy riversides and marshy ground, giving a clue to the growing conditions it needs. Soil should be moisture-retentive and never dry out. Celery hearts are particularly tasty and can be eaten raw or braised by simmering.

Sow

Sow between mid-March and early April in seed trays, modules or pots of moist compost at 15C (59F). Sowing seed direct reduces transplant shock, but it is better to start in trays or pots and transfer modules as soon as the seedlings can be handled.

Sow seed thinly and apply the merest of covering of fine vermiculite or sieved potting media. Patience is needed as germination takes time.
Transplant the young seedlings when large enough to handle, which might not be until several true leaves appear. Plant single seedlings into 7.5cm (3in) pots or modules.

Low temperatures after germination can cause ‘bolting’ (running to seed) later in life; temperatures should not fall below 10C (50F) for long than 12 hours until they are established. Delay sowing until suitable temperatures can be maintained.

Grow

The key to success with celery is plenty of water throughout the growing season.

It is also liable to bolt or run to flower and seed if shocked or chilled during transplanting or growth. Make sure plants are properly ‘hardened off’ (acclimatised to outdoor conditions) before planting out at the end of May to early June.

Trenching celery: dig a trench 38-50cm (15-20in) wide and 30 cm (12in) deep in October/November or March, incorporating plenty of well rotted organic matter. Add 70g per sq m of Growmore or other general purpose fertiliser. Plant in line along trench.

Plants can be then earthed up (mounding soil around the stems) so the stems become blanched, start doing this once stems are 30cm tall. Draw up the soil 7.5cm (3in) at a time until the top is exposed. Alternatively, use collars made of corrugated cardboard, brown paper, newspaper, plastic drainpipe or similar.

Other celery, including green and self-blanching celery: Plant 23cm (9in) apart in a block to ensure the plants shade each other to aid blanching.

Water regularly before the onset of dry weather – plants should never be allowed to dry out.

Self-blanching celery can be planted at ground level and will blanch itself by self-shading.

If growing celery in pots, feed every fortnight with a balanced liquid general fertiliser during the summer.

A light dressing of a high nitrogen fertiliser, such as Growmore, once they are established improves crops.

Harvest

Plants are ready to harvest when large enough, between August and October, and before the first hard frosts. Cut them off at the base with a sharp knife. Trench celery might last into winter as late as December, but other celery will be harmed by November frosts.

Varieties

Trench celery

‘Giant Pink – Mammoth Pink’ AGM: Pink-tinged green variety, for harvesting from mid to late winter

‘Moonbeam’ AGM: Good long, dense, smooth stems.

‘Octavius’ AGM: Attractive, short to medium-length, uniform crop, slightly ribbed, succulent stems.

Self blanching

'Granada’ AGM: F1 hybrid; pale green, reasonably smooth, quite fleshy petioles. Medium to strong flavour. Resistant to celery leaf spot (blight).

‘Celebrity’ AGM: Self-blanching, fairly short plants, with ribbed stems and good flavour.

‘Latham Self Blanching’ AGM: Vigorous with short ribbed stems and a good flavour.

‘Ivory Tower’ AGM: Self-blanching; tall with smooth petioles and good flavour.

Problems

Slugs: eat the leaves and young stems

Remedy: Non-chemical controls including hunting by torchlight on mild, damp nights, or making traps consisting of a jar half-filled with beer sunk into the ground near plants. Encourage natural predators, use pellets based on ferric phosphate.

Read more information on slugs

Celery leaf spot: shows as brown spots on older leaves, spreading to younger ones.

Remedy: Use treated seed, rotate crops.

Slugs: Eat leaves and young stems.

Remedy: Non-chemical controls including hunting by torchlight on mild, damp nights, or making traps consisting of a jar half-filled with beer sunk into the ground near plants. Encourage natural predators, use pellets based on ferric phosphate.

Read more information on slugs

Celery leaf spot: Shows as brown spots on older leaves, spreading to younger ones.

Remedy: Use treated seed, rotate crops.

Gardening calendar
JFMAMJJASOND
Sow
Harvest

Do Now

  • Sow seeds
  • Transplant seedlings into modules or pots
  • Water regularly
Advertise here