According to The Star, it can be beneficial to water your plants gradually, virtually very small amount a time, in excessively hot weather.
According to Pelargonium for Europe, an organization that specializes in producing geraniums, the slower technique allows plants a chance to absorb the water at their own rate.
Dry soil cannot absorb all the water at once; rather, it can only do so gradually while storing it for later absorption by the roots. Providing the plants with a lot of water all at once could cause some of the essential liquid to just run through the soil.
If the water cannot be lost and builds up at the bottom of the pot, the plant's roots will be at risk of rotting. Therefore, whenever you observe extra water, let it drain or flow off.
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Don't undervalue the amount of water your plants need. The amount of water per geranium in a typical-sized pot should be one glass, or roughly 10% of the pot's content, according to geranium producers.