approx. 2500 s/g
Well-grown celery requires a constant supply of moisture and food, performing best in well limed soils. For early crops sow under glass but for later sowings outdoor seedbeds are suitable.
Sow 1 to 2mm deep in summer. Transplant 10 cm apart when large enough, taking care not to cover the heartleaves. Keep moist at all times and feed heavily. Expect germination in 20 days at 20 deg.C. soil temperature.