(a) temperature: Chrysanthemum is a half-hardy vegetables, like cool and mild climate, afraid of heat.

Seeds in 10 ℃ that is germination, growth temperature 17 ~ 20 ℃, 12 ℃ below the growth of slow, 29 ℃ above the growth of poor, obvious manifestation of the leaf is small and less, the texture of coarse old.

The plant can tolerate short-term low temperature of about 0 ℃.

(ii) light: coronation is a long sunshine crop, can tolerate low light, high temperature, long sunshine can cause shoots and flowers.

When cultivated in daylight greenhouse winter and spring, it is generally not easy for shoots to occur.

(3) water: Chrysanthemum is a shallow rooted vegetables, fast growth, single plant occupies a small area of soil nutrients, so it requires an adequate supply of water.

The soil needs to be kept moist, suitable soil relative humidity of 70% to 80%, air relative humidity of 85% to 95% is appropriate.

(D) soil and nutrition: the soil requirements are not very strict, but to fertile, pH5.5 ~ 6.8 loamy soil is most suitable for the growth of Chrysanthemum.

Because of the short growing period, and to the stem and leaves as a commodity, it is necessary to timely application of fast-acting nitrogen fertilizer.

Chen Zhende et al. (1999) found that nitrogen deficiency can reduce the nitrate content of corns.

In the nitrogen, phosphorus, potassium full fertilizer application based on the addition of borax can reduce nitrate and nitrite content.

Adding hydroquinone (HQ), a urease inhibitor, at 0.5% to 1.5% of pure nitrogen can reduce nitrate content in Chrysanthemum coronarium by 4.7% to 10.7% and nitrite content by 16.3% to 20.7%.