Celery is a vegetable that is almost absent of calories, yet contains important vitamins and minerals. Celery is a little more difficult to grow than other common garden vegetables. Like leeks, celery requires a longer growing season and prefers cooler temperatures. The stalks can be very dry and stringy without correct care.
When To Plant
Celery is best started indoors. The seeds are very tiny, difficult to sow as well as thin. In addition, the longer growing season may necessitate an indoor start.
Start seeds in individual containers with as few as possible into each container. Once they start growing thin each conatiner down to oly one plant each. Transplant outdoors after the last date for frost in your planting zone.
Spacing & Depth
Choose a sunny location and space plants one foot apart, in rows 2 to 2 1/2 feet apart.
Celery is thirsty. Be sure to give celery plenty of water, too little water can cause the celery stalks to split and also be stringy and tough. Celery also likes fertilizer, compost, and mulch. The goal is to retain moisture around the plants and add nutrients.
Harvest when the stalks have grown to at least 12 inches. Plan on putting the outer stalks back in the compost bin because the inner ones will be sweeter and more tender.
You may find that insects enjoy celery as much as you do. Look for slugs, aphids, leafhoppers, and celery flies. In addition to the bugs, you may need to be on the lookout for leaf spot and blight. Celery can be treated with fungicides to help control these.