How do you grow trench varieties of celery?
Posted by Dobies Staff on 23 January 2015 12:26 pm

Celery should be raised from seed sown in March and April in trays placed in a greenhouse or frame at a temperature of about 10-15°C (50-60°F). When large enough to handle, prick out the seedlings spacing them 5cm (2") apart in trays. Give as much ventilation as outside weather conditions permit. Harden off gradually and when the plants are about 15cm (6") high they are ready for transplanting to their final position.

Choosing a sunny position, prepare the trenches by placing well rotted manure or well prepared compost in the bottom, and replace soil to within about 10cm (4") of the original level. The trenches should be approximately 38cm (15") wide, 25cm (10") deep and 120cm (4 ft) apart (should there be more than one trench side by side). The plants should be lifted, taking care not to damage the roots, and spaced about 25cm (10") apart in single or double rows and watered once planted to avoid any check. In dry weather it is essential to water the plants and apply a balanced liquid feed during the summer months.

Blanching should not commence until the plants are about 30cm (12") high. Loosely tie paper collars around the plant. In late August mound moist soil around the stems, this earthing up may be done at about 3 week intervals. At the final earthing up the stems should be completely covered (right up to the leaves), taking care to avoid any soil falling into the hearts of the plants.

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