Planting Instructions: Start transplants indoors from February through April. Soil must be kept above 55ºF but below 85ºF. Germination is very slow – up to three weeks. Keep moist but not wet.
Sow celery seed ¼ to ½ inch deep, 6 to 10 inches (15-25cm) apart; space rows 24 inches (61cm) apart.
Transplant out when plants are three to five inches tall after danger of frost has passed. They like rich soil loaded with organic matter with a pH of about 6.5. They are a very heavy feeder.