Prefers a rich light moist soil with some shade in summer. Prefers a sunny position and a pH between 6.6 and 6.8. Tolerates a pH in the range 4.2 to 8.3. Plants grow best in a climate with a mean temperature in the range 16 - 21°c, leaf growth is poor at higher temperatures, low temperatures can induce the plant to run to seed prematurely. Plants with 5 or more true leaves will flower following exposure to temperatures between 5 - 10°c for 10 days or more. Celery is commonly cultivated in many regions of the world, mainly for its edible leaf stalks. There are many named varieties and these can supply fresh stalks from late summer to spring. There are two basic types of celery. Those grown for summer and autumn harvesting are called 'self-blanching' - the stems do not need to be blanched in order to be eaten, though they are usually grown quite closely together which tends to exclude quite a bit of light. Those cultivars harvested in the winter and spring tend to have bitter-tasting stems unless these are blanched by excluding light. A good companion for leeks, tomatoes, French beans and brassicas.
Leaf stems - raw or cooked. A fairly common salad ingredient, celery stems are also used to make soups, stews etc. The winter varieties can be bitter if they are not blanched by excluding light from the stems for at least a few weeks prior to harvesting. Many people find the raw stalks are somewhat indigestible. Leaves - raw or cooked. They are often used as a flavoring in soups etc. They can also be eaten raw but have a very strong flavor and are probably best as a minor ingredient in a mixed salad. Seed - used as a flavoring for sauces, soups, pickles etc. An essential oil from the seed is also used as a flavoring. Root - cooked. There is not much of it but it can be cut up and added to soups.
Seed - germination can be erratic and the seed is best surface sow February in a greenhouse. The maincrop can be sown as late as mid-April. Outdoor sown seed rarely germinates satisfactorily. Germinates in 2 - 3 weeks at 15°c. Plant out in May. The seed can harbour certain diseases of celery, it is usually treated by seed companies before being sold but if you save your own seed you should make sure that only seed from healthy plants is used.
Not known in the wild.
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