They are different from the location condition. It can grow at 5-8 degree, the good temperature is 15-20.
    Flower and growing is the biggest time for it. If meeting the dry season, it needs the 15-20 ton water. It is key point:

• prepare for the planting: deep loose the land, and then 10 days before watering.
• Ferment: mixing the ferment, put into loosing the land.
• Process before the planting
• Requirements: deepen loose the land and then put the root up and then cover it.
• Regulating in the land: preventing the insect and watering to enhance the production.
• Harvest, as the different season, it mainly harvest in the June.
• Preventing the insect. We must pay more attention to the inspect and process the seed, on time treatment during the spill the medicine.
• It needs the cool condition, because it is at the highland. In our country, there are different type of it. During the time. it has the natural condition. So it is important from the condition.