Key Points of Fennel Cultivation Techniques: Management Methods from Sowing to Harvest

Fennel is a perennial herbaceous plant of the Apiaceae family. In production it is mostly grown as a biennial or annual vegetable. Its tender stems and leaves have a distinctive aroma and can be eaten as a vegetable or used as a seasoning, while the seeds can also be used as a spice. It prefers a cool, moist climate and is fairly cold-tolerant, but not tolerant of high temperatures or drought. Its requirements for soil are not particularly strict, though it grows better on loose, fertile plots with good drainage.

Common cultivated types include leaf fennel, large fennel and bulb fennel. Leaf fennel grows quickly and has a strong aroma, and is mainly harvested for its tender seedlings and young leaves; bulb fennel is grown for its swollen bulb, which is used as food, and has a relatively longer growing period. Before planting, suitable varieties should be chosen according to the local climate and the intended use.

When preparing the soil, apply plenty of decomposed organic fertilizer as a base dressing. Because fennel seeds germinate slowly, soaking them in warm water before sowing can speed up germination. Sowing can be done in both spring and autumn. After sowing, keep the soil moist; after seedlings emerge, thin them and weed in time to prevent the young plants from crowding each other. During the growing period, water so as to keep the soil alternately dry and moist, and apply topdressing mainly with nitrogen fertilizer to promote lush stems and leaves. At the same time, watch for pests and diseases such as aphids and powdery mildew, and deal with them promptly once found.

Once leaf fennel has grown to a certain height, it can be harvested in batches by thinning or by cutting close to the ground. Harvesting is best done in the early morning, when the plants have plenty of moisture and a strong aroma. Plants kept for seed can be harvested once the seeds mature and then dried. To reduce the buildup of disease, it is best to avoid continuous cropping and to rotate fennel reasonably with other crops, which will keep the field growing more steadily.