All sweet potato seedlings should be grown between mid-February and mid-April.

Spring potato breeding is mostly done before and after the Jingzhe. In areas south of the Huaihe River, breeding starts after mid-February. In areas north of the Huaihe River, breeding is completed before April 10th. Breeding in hotbeds or cold beds covered with plastic films is the best method. host. Potatoes are usually planted in the open field before April 20. It is more suitable to breed in the open field without covering with film. The breeding should be done 45 days before planting seedlings.

Because the temperature is low during cultivation, it must be cultivated in a hotbed. During this period, heat preservation measures must be taken, and the cultivation time can also be reasonably grasped according to the planting and listing time, usually when planting sweet potatoes. Start cultivating 4-5 weeks before seedlings.

Precautions for cultivating sweet potato seedlings: Choose the appropriate cultivation method according to the region, and do a good job of heat preservation during cultivation.

How to raise sweet potato seedlings

1. Sweet potato root seedlings

Root seedlings are also the most commonly used seedling raising method. The seedling raising time will vary from place to place, but Under normal circumstances, sweet potato seedlings should be cultivated between mid-February and mid-April.

The so-called sweet potato root seedling method is to plant the harvested sweet potato roots into the seedling land of your choice, and then seedlings will grow from the sweet potato roots. Each sweet potato root will grow 2 or 3 Each sweet potato seedling has independent roots at its root.

2. Sweet potato vine cultivation

Potato vine cultivation requires keeping the potato vines after the autumn harvest for one winter, and cuttings will take root next year. This method saves labor and time compared with root seedling cultivation, but it is somewhat difficult to operate. The specific method is to select strong potato vines that are frost-free and disease-free after the sweet potatoes are harvested in autumn, remove the leaves, retain 1 cm of petioles, and cut every two sections to form potato vine segments. The subsequent operation methods are the same as normal planting.

3. Potato root seedling cultivation method

The root system of sweet potatoes can also reproduce. The potato root seedling cultivation method has the characteristics of utilizing space and large number of seedlings, and the potato roots can still be harvested to a certain extent in spring. Yield of sweet potatoes.

Generally, when digging sweet potatoes in autumn, the roots of the sweet potatoes are pruned and then buried in an insulated greenhouse or indoor room with heating conditions, where they can continue to grow, and the sweet potato stems and vines are cut for propagation. You can also store the sweet potato roots in a sweet potato cellar and plant them in the following spring.

4. Potato seedling cultivation method

This method is to intercept the vigorous spring potato seedlings, each seedling is 20-30cm long, and plant them directly without roots. This kind of seedlings is suitable for autumn potato planting, and is suitable for planting in southern my country, Shandong and Henan. The advantage of raising seedlings in this way is that it effectively eliminates the carrying of diseases, which is equivalent to automatic disinfection during the seedling stage.