Top Tips for Protecting Plants in a Heatwave

Michael Wooldridge, director of Woodlodge Products, provides his top tips for looking after your crops during the heat of summer.

Britain is known for its unpredictable weather, but the recent heatwave has come as a surprise to most of us. During such hot temperatures it is essential that gardens, vegetables and potted crops are cared for appropriately.

In extreme conditions (26ºC and above) plants are susceptible to leaf scorch or burning, with some leaves curling or dropping completely in an attempt to conserve water. Many struggle to produce fruit and vegetables, with fruits such as oranges and tomatoes likely to split or become misshapen. Cool-season crops, like broccoli, are in danger of bolting, and blossom end rot is common in numerous edibles including peppers and squash.

The first step in reducing such problems is to ensure that plants are not in direct sunlight. Shade cloth and greenhouse blinds can be erected to create protection, and pots on patios should be moved to shady areas – especially during the hours of strongest sun. Lightweight containers are available for easier movement, and small troughs can be purchased to sit on sheltered windowsills. Young and vulnerable crops are best positioned under strong trees which can provide shade.

A key priority during hot weather is regular irrigation. It is generally advised to water once a day during the summer, but some crops require soaking twice daily during extreme temperatures. Avoid watering at midday when water droplets magnify the sun’s rays on leaves. Instead, opt for early morning or late evening when the air is cooler. A deep soak is preferable to continuous light sprinkling, but drip irrigation is a helpful solution if crops are going to be left alone for several days over weekends or holidays. Water granules can also be placed in containers to soak up excess liquid for later release during times of drought. It’s important to know which edibles need more to drink, such as salad leaves, and which are better suited to dry conditions. Potted plants need extra care because of their limited container size and ability to store water, but succulents need less consideration due to the fluid retention abilities of their fleshy leaves.

Unfortunately, there are many pests that will thrive when temperatures rise. Bugs and flies take advantage of stressed or overheated plants, and weed growth often increases. Be sure to keep an eye on stems and the undersides of leaves to make sure that unwanted pests are removed. Use organic deterrent sprays where necessary. Adding mulch to the soil surface will also decrease weed surges, whilst helping to lock in moisture.

The good news for gardeners is that warm weather can increase fruit ripening and encourage flowers to bloom. Repotting is often necessary due to rapid growth, and young plants can be potted on or placed in the ground to provide more space.

Summer is the highlight of the gardening season and the culmination of months of hard work. Heat comes with potential perils, but by preparing for all eventualities and taking a thoughtful approach to plant care, growers can maximise the opportunities brought by good weather. Enjoy the sunshine while it lasts!

Woodlodge is the UK’s leading supplier of garden pots, with a reputation for excellence and expertise in the design and distribution of gardenware and horticulture products. The family business has been trading since 1987, prioritising quality and end-to-end customer service. Woodlodge is proud to hold a partnership with the National Trust, distributing products to over 2,000 garden centres and retail outlets nationwide. Visit woodlodge.co.uk for more information.

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