What should be noted about spraying and watering flowers in midsummer?

In midsummer, temperatures are high and evaporation is great, so the amount and frequency of spraying and watering potted flowers must be increased.

For general flowering plants, watering is best done between 9 and 10 a.m. and between 3 and 4 p.m. Evergreen foliage plants develop dry edges and scorched leaves in hot weather, so they should generally be placed under a shade frame to spend the summer, and at noon clean water can be sprayed on the leaves and the nearby ground to lower the temperature and increase humidity.

General flowering plants must absolutely not be sprayed or watered at noon. Because at noon the temperature is highest, leaf surface temperature can reach over 30 degrees, the stomata are wide open, and transpiration and respiration are intensified. If spraying is suddenly done at this time, when the water temperature is only around ten-odd degrees, the leaf cells will enter a state of tension and cause wilting. Moreover, the pot soil temperature is also very high; watering flowers with cold water stimulates the root hairs at low temperature, immediately affecting the root hairs' absorption function, causing water loss and making the plant wilt.

For evergreen foliage plants under the shade frame, when spraying and watering at noon, it is best to use water that has been left standing in a vat in the sun. This can narrow the temperature difference between the water and the air and soil temperatures, and can also release chlorine and bleaching powder from the water, which benefits flower growth.