Back to section
During a hot week, it is tempting to urgently water, feed and trim everything looking tired. Combining several jobs can increase stress. First identify the most vulnerable plants and address a specific cause: a dry root ball, a scorching wall, failed irrigation or an overheated container.
Check new plants first
A fresh planting and a small pot lose available moisture faster. Look at the soil, leaf edges and root-ball stability. Make sure water reaches roots rather than flowing past dry container compost.
Move portable pots to a place with suitable light and protection from the worst overheating. Do not unnecessarily move a sun-loving crop into permanent deep shade: temporary help should remain temporary.
Provide shade with airflow
A shade net on an independent support may help a sensitive young planting. Leave space between material and foliage, and do not seal the sides. Avoid covering a shrub with transparent plastic, which can increase overheating.
In the long term, choosing plants suited to the site and grouping them by requirements is more reliable. Principles of gardening with lower water needs are discussed by RHS.
Postpone non-essential work
Transplanting, severe trimming and intensive feeding are not universal remedies for heat. Postpone planting until milder weather if possible. Do not immediately remove all damaged leaves; first assess the plant and wait for a clearer picture.
Use plant-protection products only for an identified purpose and in conditions allowed by the instructions. Heat may restrict treatment timing and method. Mixing several products to speed recovery is particularly unwise.
Distinguish temporary wilting from a persistent problem
Some leaves lose firmness during the hottest hour and recover by evening. If the plant looks healthy in the morning and soil moisture is appropriate, do not automatically increase watering. Persistent wilting, new dry areas or a completely dry root ball require closer investigation.
When the heat ends, review temporary shading and irrigation. Gradually return the plant to its usual conditions, continue observations and record the hottest areas of the site. In autumn, use that information to improve planting positions so the next hot spell requires fewer urgent interventions.