Factors Affecting the Flowering of Iris

Physiological factors of iris flowering

Iris has to go through a juvenile stage before it can bloom, which means it has to reach a certain age before it can bloom. Irises grow leaves before flowers. The leaves and various parts of their flowers are fully grown in autumn and wrapped in buds. As the temperature rises in the spring of the following year, the flowers and leaves will stretch out, forming a phenomenon of long leaves and blooming flowers.

Light factors for iris flowering

Irises need sufficient light to bloom. Long-term light is beneficial to promote the radial growth of iris stems, thereby advancing the flowering period. Moreover, sufficient light will not only increase the number of flower stems and flowers, but also extend the flowering period.

Temperature Factors for Iris Flowering

The temperature of the soil is very important, and it is best to control it between 16℃ and 18℃. Too low soil temperature will reduce the ability to bloom and affect the blooming of flowers. When there is insufficient light in autumn, the room temperature needs to be lowered appropriately to prevent the flowers from wilting. The suitable room temperature for iris growth is 13-18℃, but if it exceeds 25℃, it will not grow normally and flower blindness is likely to occur. Be careful to avoid high temperatures, provide appropriate shade and ensure ventilation.

Water Factors for Iris Flowering

Before planting, water the soil first. Iris also needs appropriate humidity during its growth period, so keep the soil moist. Good humidity conditions are particularly important for the growth of irises. Insufficient humidity may affect the height of the plant and the quality of the flowers.

Other factors of iris flowering

Ventilation is a good means of controlling temperature and humidity, but be careful not to drop the humidity too quickly during ventilation, otherwise it may cause the leaves to wither, leading to a decline in the quality of cut flowers. In addition, carbon dioxide has no effect on the flowering period of irises, so you can rest assured.

Many factors such as light, water, fertilizer, temperature, humidity, etc. will affect the flowering of irises. I will stop here for now.