Seed Depth: 1/8–1/4 inch

Seed Spacing: 6–8 inches

Row Spacing: 18–24 inches

Sunlight: Full sun to partial shade

Days to Sprout: 10–21 days

Days to Maturity: 85–100 days

Growth Habit: Upright, leafy biennial grown as an annual

Sunlight: Prefers full sun but tolerates partial shade, especially in warmer climates.

Soil Type: Thrives in rich, well-drained soil with a pH of 6.0–7.0. Adding compost improves soil fertility and moisture retention.

When to Plant: Start seeds indoors 10–12 weeks before the last frost. Transplant outdoors when temperatures consistently stay above 50°F.

Direct Sowing: Not recommended due to the small seed size and long growing season.

Indoor Sowing: Sow seeds 1/8–1/4 inch deep in seed trays. Transplant seedlings when they are 4–6 inches tall.

Succession Planting: Not typically needed, as celery has a long growing season.

Watering: Water consistently to keep the soil evenly moist but not waterlogged. Celery requires steady moisture for tender stalks.

Fertilizing: Apply a nitrogen-rich fertilizer or compost every few weeks to promote strong, leafy growth.

Pruning: Remove yellowing or damaged leaves to maintain plant health.

Pest and Disease Control: Monitor for aphids, slugs, and fungal diseases. Use organic pest controls and proper spacing for airflow.

When to Harvest: Harvest when stalks are 8–10 inches tall, typically 85–100 days after planting. Baby stalks can be harvested earlier for tender, mild flavor.

How to Harvest: Cut stalks individually at the base or harvest the entire plant at once. Handle gently to avoid bruising.

Seed Collection: Allow plants to flower and form seeds in their second year. Collect seeds once heads are fully dry.

Storing Seeds: Store seeds in an airtight container in a cool, dry place.