Heat, watering and how to keep your pots happy
June is the month when the garden suddenly shifts gear. One warm week (in spite of that week of torrential downpours) and everything surges: roses open, borders fill out, and the soil dries faster than you expect. Even established plants can look a little stressed as temperatures rise and the long days pull moisture from the ground.
This is the moment to pay attention to how you water… not just how much.
Good watering in June isn’t about frequency. It’s about getting water to the right place, in the right way, so plants can use it well and your water butts last the longest possible time.
Deep watering beats frequent sprinkling
When the weather heats up, it’s tempting to give everything a quick sprinkle every evening. But this only wets the top centimetre of soil, encouraging roots to stay shallow, which is exactly where the heat dries them out fastest.
A better approach is a deep soak, less often. Water slowly, let it sink in, and give the roots a reason to grow downwards where the soil stays cooler and is more stable.
Morning is the best time for watering. Plants are at their coolest, they draw water up efficiently, and you avoid leaving foliage damp overnight when slugs and snails are most active.
The magic of trays, buckets and dipping pots
For small and medium pots, nothing beats the simplicity of bottom‑watering.
A tray, a trug, a bucket, anything that holds a few centimetres of water, becomes a brilliant tool in hot weather. Stand your pots in the water and let them drink from below. The compost absorbs exactly what it needs, and you avoid the waste that comes from watering from above.
It’s efficient, it’s quick, and it keeps the foliage dry.
What about big pots, tubs and troughs?
Some containers are simply too heavy to lift and dunk. These need a different rhythm.
Water daily in hot spells, large volumes of compost dry out surprisingly fast.
Aim the water under the leaves, straight onto the soil, not the foliage.
Water slowly and let it soak in rather than running off the sides.
Mulch the surface with bark, composted woodchip or even a layer of gravel will all help to keep moisture in.
If you’re consistent, you’ll use less water overall because the compost stays evenly moist rather than swinging between bone‑dry and saturated.
Mulch: Your June superpower
Mulch is one of the simplest ways to help plants cope with heat. It:
slows evaporation
keeps soil temperatures stable
protects fine surface roots
reduces how often you need to water
A 5–7cm layer around perennials, shrubs and pots makes a noticeable difference in hot weather.
June isn’t about watering more… it’s about watering better. Deeply, early, and with intention. Using trays and buckets where you can, and being consistent with the containers you can’t lift. Keeping water on the soil, not the leaves. Mulching to hold onto every precious drop.
With a little care, the garden moves through the heat with ease, and you use far less water than you think.