Always water in the morning
Morning watering gives foliage time to dry during the day, reducing disease. Water sits at the roots where it's needed. Evening watering works but leaves are wet overnight — ideal conditions for mildew and botrytis.
Deep and infrequent beats little and often
Watering deeply once or twice a week encourages deep roots that can access moisture during dry spells. Shallow watering every day produces shallow roots that are vulnerable to drought and heat stress.
Mulch saves more water than anything else
A 5–10cm layer of compost, bark, straw or grass clippings around plants dramatically reduces evaporation. In a dry summer, a well-mulched border may need watering half as often as an unmulched one.
Water at the base, not overhead
Direct water to the root zone, not the leaves. Overhead watering wastes water through evaporation and wets foliage unnecessarily. Use a rose head (gentle spray) for seedlings, direct watering for established plants.
Check before you water
Push a finger 5cm into the soil. If it's moist, don't water. Overwatering is as damaging as underwatering — it drives out oxygen and encourages root rot. Containers dry out faster than borders and need daily checks in summer.
Harvest rainwater wherever possible
A single water butt connected to a downpipe can collect hundreds of litres a year. Rainwater is slightly acidic — better for acid-loving plants. In dry summers it also becomes a precious resource when hosepipe bans apply.
Water twice daily for containers
In temperatures above 25°C, containers can need watering morning and evening. Push a finger into the compost — if dry below the surface, water thoroughly until it drains from the bottom.
Don't panic about wilting leaves
Many plants wilt in midday heat as a water-conservation mechanism — this is normal. Check in the morning before the heat builds. If plants are still wilted in the cool of the morning, they need water urgently.
Move containers to shade
In extreme heat, move pots to a shaded spot during the hottest part of the day (12–4pm). This dramatically reduces water loss and heat stress. Move back to sun in the evening.
Never let tomatoes and courgettes dry out
Irregular watering causes blossom end rot in tomatoes and peppers, and bitter, misshapen fruits in courgettes. In a heatwave, water tomato containers daily — twice daily if they dry out by evening.