Grouping potted herbs together to create a microclimate can significantly reduce water loss and help plants survive heatwaves, according to gardening expert Didrik Dege Dimmen. The tip comes as the UK experiences its hottest June on record, followed by a scorching July with widespread heatwaves, and eight million households under hosepipe bans.
Why herbs struggle in high temperatures
Herbs are especially susceptible to drought and heat stress when temperatures rise above 30°C. With hosepipe bans limiting watering options, keeping them alive becomes even more challenging. Didrik Dege Dimmen, founder of the company behind the world's first open-system smart indoor garden Auk, said: “With hosepipe bans and heatwaves becoming the new normal, it’s time to get creative in how we care for our herbs. A little extra attention and smart watering can keep your kitchen garden thriving, come rain or shine.”
Grouping pots to create a microclimate
One of Dimmen's top tips requires no watering at all. He recommends grouping potted herbs together to create a microclimate that reduces water loss. This simple adjustment takes almost no time and can make a big difference in keeping herbs happy during summer heat.
Watering at the right time
Dimmen also advises watering pots at the end of the day when temperatures drop. This prevents water from evaporating before it reaches the roots, ensuring the plants get the hydration they need.
Moving pots to shade
For outdoor plant pots, moving them to a shaded area can prevent rapid drying and overheating in the summer sun, further protecting herbs from heat stress.
Choosing heat-tolerant herbs
Some herbs are better suited to hot weather. Woodier herbs like rosemary, thyme, and oregano cope better and need less water than more delicate herbs such as basil. Gardeners should consider what they want to grow and select varieties that will thrive in heatwave conditions.
Regular pruning benefits
No matter what herbs are in the garden, they all benefit from regular pruning. This encourages bushier, healthier plants and reduces water needs, helping them survive dry spells.
