甘蓝形成花芽、抽薹开花,需要3个条件: 一是植株长到一定粗度,有一定的营养贮备。早熟春甘蓝接受低温,生长点发生质变产生花芽,其茎粗需达0.5～0.6厘米,叶宽4～5厘米,并有7～10片真叶。因为甘蓝具有这一特点,所以,不但秋季可种,春季也可种。在甘兰茎 Cabbage formation of flower buds, bolting flowering, you need three conditions: First, the plants grow to a certain degree of roughness, there is a certain nutritional reserves. Early spring cabbage to accept low temperature, the growth point of the qualitative change occurred to produce flower buds, the stems need to reach 0.5 to 0.6 cm, leaf width 4 to 5 cm, and 7 to 10 true leaves. Because cabbage has this feature, so not only can fall autumn, spring can also be planted. In kulan stems