What yield and pests should I expect with celery?

Fresh celery yield depends on whether you grow it for thick stalks or for leaf, and on the long season it needs, so treat any single figure with caution and plan conservatively. Main problems are leaf spot (early and late blight type fungal diseases), aphids, leaf miner and caterpillars, and physiological issues like blackheart from calcium and water stress. Because stalks and leaves are eaten fresh, manage with clean seed, good spacing for airflow, steady moisture, and recommended controls following the pre harvest interval. Verify achievable yield, a good variety and the spray plan with your KVK for your conditions.