Brassica oleracea

Brassica Oleracea, also known as Cabbage, has thick basal leaves gathering in a spherical shape. Cabbage is an important vegetable in many countries. The concentrated juice from its leaves can be used to treat with stomach illness. 
As an ornamental plant, this plant can be displayed at the side of street. It forms a variety of beautiful patterns for decoration. The leaves have a variety of colors, such as purple, white, yellow and so on. 
Cabbage prefers mild and moist weather, and needs plenty of sunshine. It is resistant to cold, but it can also adapt to high temperatures at the same time. The optimum temperature for its growth is around 15-20℃. The fleshy stem of this plant will turn into fibrosis if it is above 30℃. 
The main root of cabbage is not much developed, but it can grow some irregular lateral roots. Their roots have great ability to absorb nutrients and water, helping the plant go through drought and flood environment. Seeds can be kept for 2-3 years under dry condition. 
When sowing seeds, choose the varieties that are easy to mature and have a strong resistance to disease. First, sterilize the seeds and then soak them in warm water of 20 to 30℃ for 2 hours. Then drain the water and place the seeds into fine sand to accelerate germination. After about 3 days, the tip of the seeds will grow white buds, which is ready to be planted. 
You need to remove weeds timely, and remember to keep the night temperature at least 10℃, thus can help the leaves grow faster. 
If the weather is in high humidity during growing process of cabbage, downy mildew disease may easily occur. The disease usually occurs when the leaves begin to gathering. You can use commercial fungicide to control the disease at the early stage. 
When the cabbage become firm and full, it is time to harvest. Keep 2 or 3 old leaves to protect the plant. Cabbage is rich in nutrients, having a variety of high-quality protein, fiber, minerals, vitamins and so on. Eating cabbage can supply sufficient nutrition and strengthen your body. 

3-6 hours of sun per day, with protection from intense mid-day sun

Water moderately, allowing the top 3cm to dry out between watering.