I come from Min County in the northwest of Gansu Province. I planted two grapes in the solar greenhouse, with lush foliage. Why didn't it bear much fruit?

The main reason is that your lack of technical knowledge leads to the white growth of grapes.

Grape growth period management: (1) bud wiping. Erase too many unnecessary gentle tips as soon as possible. (2) prick the tip and remove the tendrils. When the new shoots grow to 25~30 cm, they should be tied in time and the tendrils should be removed. (3) New tip coring and secondary tip processing. The secondary branch under the ear can be removed from the base, and the secondary branch on the ear can be cored with 2 leaves, and the secondary branch at the top of the main branch can be left with a few leaves. One week before flowering, the fruit branches can leave 6-8 leaves above the ear for coring. (4) Pruning of inflorescence and ear. It is suggested to leave a well-developed inflorescence on the fruiting branch. For the varieties with scattered panicles, the secondary panicle should be cut off and the tip should be pinched before flowering; Varieties with high fruit setting rate should be sparse after flowering.

Per 100 kg of berries, about 0.25-0.75 kg of nitrogen, 0.2-0.75 kg of phosphorus and 0. 13-0.63 kg of potassium should be applied. Base fertilizer should be applied from the end of September to the beginning of 10 when the new shoots are fully mature. Topdressing is usually topdressing with available nitrogen fertilizer more than ten days before flowering. At the beginning of July, topdressing potassium fertilizer was the main method. Fertilization should be carried out in an annular ditch about 1 m away from the plant. The depth of base fertilizer is about 40 cm, and the topdressing should be shallow. Water is needed after fertilization. Spraying 1-3% calcium superphosphate solution before flowering, young fruit stage and berry maturity; Spraying 0.05-0. 1% boric acid solution before flowering; Spraying potassium salt solution or 3% plant ash extract during fruit setting and fruit growth. Before the juice flows to blossom, we should pay attention to keep the soil moist and create good fertilizer and water conditions for flowering and fruit setting. But it is not suitable for watering at flowering stage. After fruit setting and before coloring, a lot of water is needed, which can be watered every 7- 10 days according to the weather. Fruit grains are generally not watered during the coloring period. After harvest, combine fertilization in autumn and water once permeable and once frozen in winter. The extracted hope is helpful to you.