Control Methods for Non-Infectious Physiological Diseases of Summer and Autumn Flowers

Non-infectious physiological diseases: the most prominent are sunscald and drought/flood damage. Except for succulent sun-loving flowers such as cacti, which can withstand strong light in the open air, neutral, shade-tolerant and heavily shade-tolerant flowers should all be given 40—80% shade, and sunny windowsills should also be fitted with shade frames to prevent sunscald.

For those whose surface soil shows slight dryness, water thoroughly and slowly, spray a fine mist in the morning and evening, and sprinkle water around the plants at noon to cool them and keep in moisture. In case of heavy rain or continuous rain, clear the drainage holes in the pots promptly to prevent waterlogging of the roots, which leads to root oxygen deficiency and wilting.

In addition, it is very important to apply a 2% potassium sulfate (or potassium nitrate) liquid fertilizer once every seven days, for a total of two applications, to improve the plants' stress resistance.