Apium graveolens var. dulce
Plant outdoors 20-23 cm (8-10″) apart.
Sow seeds indoors 3 mm (1/8″) deep.
Prefers sun, rich soil and frequent watering. pH around 6-7.
Seeds will sprout in 10-20 days.
Aphids, European corn borers, thrips
Start indoors 10-12 weeks before last frost, the plant out just before last frost.
The plants require constant moisture – at least 2.5 cm (1″) of water per week – and regular feeding with a balanced fertilizer. Mulch around the plants to conserve moisture in the soil and prevent weeds. Protect the plants if temperatures are forecast to drop below 12.7°C (55°F).