Starting a celery crop from a transplant is the preferred way for most home gardeners to introduce celery to their garden beds, but celery can also be grown from seed. When starting from seed, seeds should be sown 10-12 weeks before the last spring frost, then transplanted to puts after they reach 2 inches tall. Once the potted celery reaches 6-8 inches, harden the plants off for about a week, and then move them to the garden. Plant your crop in a bright spot in the garden that doesn’t receive direct sun, and space them 6 to 8 inches apart in rows. Liberally apply mulch to the area, and water at least 1 inch a week. Celery also benefits from bi-weekly fertilizing.
Blanching your celery crop during its growth will prevent any of the stalks from becoming bitter. Two weeks before you are ready to harvest, it’s time to blanch your celery crop. Using twine, tie the tops of each celery plant together. Take an old can, pipe, or milk carton, and place it over the celery stalks so they are completely covered and do not receive any light. Doing this will lighten the color of the celery stalks, and keep some of the sweet flavor in the stalk after harvesting. To harvest your celery crop, take a sharp knife and cut the stalks off just below the soil line.