Watering Containers
Method
Pots, hanging baskets and window boxes can dry out remarkably quickly because their roots have limited compost and exposed sides. In summer, check them daily, and sometimes twice on hot or windy days. Thorough watering, sensible grouping and a little shade at the right time make container gardening far more resilient.
How it works
Water the compost slowly until moisture runs from the drainage holes at the base, showing that the root ball has been wetted. Empty excess water from saucers after a short period if plants dislike sitting wet, but use saucers where appropriate to catch runoff. Grouping containers creates a more humid, sheltered pocket and reduces drying wind. Larger pots hold more moisture than small ones. Self-watering containers and reservoirs can provide a steady supply, but still need regular checking in hot weather.
Best for
These measures are essential for patio pots, hanging baskets, window boxes, growbags and greenhouse containers. They particularly help tomatoes, herbs, salad leaves, bedding plants and young fruit trees, all of which can suffer quickly if compost dries out. Very drought-tolerant plants need less frequent watering, but should still be watered thoroughly when they do need it.
Tips
Check compost a few cm below the surface rather than relying on its colour. Water at the base in morning or evening, and avoid wetting leaves unnecessarily. Use mulch on large containers and stand pots together out of strong wind. If a pot is bone dry, stand it briefly in water or water in stages to re-wet it.
Watering Containers: frequently asked questions
How does watering containers work?
Water the compost slowly until moisture runs from the drainage holes at the base, showing that the root ball has been wetted.
What is watering containers best for?
These measures are essential for patio pots, hanging baskets, window boxes, growbags and greenhouse containers.
What are some tips for watering containers?
Check compost a few cm below the surface rather than relying on its colour.
General guidance for UK gardens and allotments. Page updated 18 Sep 2026.