Most plants depend on even moisture. Slight drying out, however, before watering can promote root growth in plants.
In the flower bed, one to two watering sessions per week is usually sufficient. It is better to water occasionally but with plenty of water rather than a little water often.
When you water cool soil in the evening less water evaporates than when watering hot soil during the day. Watering of an evening or early morning also allows plants to sufficiently supply themselves with water before the next day’s heat.
Wet leaves can become diseased leaves. Kept wet overnight, leaf-mould may result. Leaves that are wet in the sun can develop slight burn marks (burning glass effect of the water droplets).
Requirement-suited watering means that the water must sufficiently reach the roots. Too little water will only cover the upper soil centimetres or may not even reach them at all ( e.g. when there is mulch covering the soil).
Water needs a moment to seep into the soil. To prevent precious water in the bed flowing away unused it’s better to water repeatedly in sections.
Always watering at one root point only leads to onesided root growth and thereby to poorer nutrient absorption from the soil. Therefore, always water around the plant and covering the entire irrigation area.
Water as much as necessary and as little as possible. This can be simplified with an automatic irrigation system with moisture sensor located in the garden bed, on the balcony and on the lawn.
Waterlogging suppresses the breathing air of the roots out of the soil and the root cells drown without oxygen.
Plant soil rich in clay minerals has better expanding properties and can therefore hold water in the soil much better and in a more even way. In wet summers and in winter ensure adequate water drainage to prevent waterlogging.