1, its cold resistance is very poor. It is not easy to form lignified sapphire vines. If the new stem is exposed to low temperature in advance, it is easy to be frozen. There are also higher requirements for the growth environment. Therefore, it is not suitable for planting in areas where winter starts earlier or for a long time.
2. The branches and leaves are very long. Sapphire grape has thick stems and lush leaves, but it is not easy to blossom and bear fruit, so it needs to be controlled during its growth.
3. Poor disease resistance. Contrary to the soft description, this variety has poor disease resistance in the actual planting process, and once it gets sick, it is easy to spread.
4. The fruit period of sapphire grape is from August to 10, which is the rainy season. It is difficult to reach the fruiting period of 1-2 months. If you don't pick it when it is ripe, it is estimated that it will rot in a few days. Fifth, the price of seedlings is too high. It is understood that the price of sapphire grape nursery that first appeared this year is 7- 15 yuan. After the Miao merchants changed hands, the price doubled. If you plant blindly, the investment is too big and the risk is too great.
Grape planting time and method:
Grapes should be planted in suitable soil, and grapes are suitable for growing in loose, fertile and well-drained soil. Humus soil, river sand soil and garden soil can be mixed as cultivation substrates. Before planting, it is necessary to add a proper amount of decomposed organic fertilizer and farmyard manure to the soil, then spread the seeds evenly on the soil surface and cover them with a plastic film, so that the grapes can emerge quickly.
When grapes grow 3-4 true leaves, a thin layer of fertilizer is needed to accelerate the growth of grapes. Grapes grow vigorously in summer, so it is necessary to apply compound fertilizer rich in nitrogen, phosphorus and potassium to provide nutrients for grape flowering and fruiting and improve grape yield.
In the process of grape growth, proper pruning should be carried out in spring and autumn every year to cut off the long-growing side branches of the vine so as to provide nutrients to the main branches and improve the yield of the vine. In addition, it is necessary to prune the yellow branches and diseased branches of grapes to reduce the loss of nutrients.