1, temperature
In the same area, the early and late flowering of peony is closely related to the spring temperature changes. What season the peony flowers bloom, the temperature can also affect the whole process of flowering. Warm and cold spring, the flowering period can be 4 ~ 5 days to 10 ~ 20 days difference.
2, moisture and rainfall
Moisture and rainfall has little effect on the flowering period, in the pre-flowering irrigation or rainfall, help peony flowering, large flowers, colorful flowers; but if encountered a large rainfall, flower damage, will be defeated early. If the soil moisture content is low before flowering, it will make the flowers smaller, less colorful and shorten the flowering period.
3, light
Light is often accompanied by temperature and a significant impact on plant growth and development and flowering. Insufficient light before flowering, will affect the color of the flower, so that it is not strong enough, the flowering of strong light, accompanied by rising temperatures, will shorten the flowering period or burn flowers. Therefore, in the flowering period with a sunshade, will extend the flowering period of peony.
In addition, peony filaments yellow, disk shallow cup-shaped, wrapped around the base of the carpel, the tip obtuse rounded, and now horticultural varieties of flowers in a variety of colors, there are white, pink, red, purple, yellow, green, black and compound color, etc., petals can be up to a hundred, some varieties even have 880, the flower type is variable. Therefore, peonies usually bloom in May to June and open around 7 am every day.