Celery Growing Guide Apium graveolens Crop Rotation Group Umbelliferae (Carrot and root family) ● Soil Rich, moisture-retentive soil with plenty of compost dug in. Position Shade or semi-shade. Frost tolerant No. Feeding Weekly liquid feed in mid to late summer. Spacing Single Plants: 20cm (7") each way (minimum) Rows: 15cm (5") with 30cm (11") row gap (minimum) Sow and Plant Sow early spring under cover. Plant out early summer. Our Garden Planner can produce a personalised calendar of when to sow, plant and harvest for your area. Notes Unless using a self-blanching type, will need to be planted in trenches, then tubes wrapped round in mid summer and/or earthed up with soil. Keep moist during dry weather. Harvesting Can cut frequently if required. In any case harvest before the first frost in autumn. Planting and Harvesting Calendar < Back to All Plants Pests which Affect Celery Aphids (General) Carrot Root Fly Slug Snail Plant Diseases which Affect Celery Carrot Powdery Mildew Celery Root Knot Nematodes Celery Viruses