Gardeners are being urged to grow plants that can withstand extreme heat and cold, as the Royal Horticultural Society (RHS) receives numerous inquiries from members about why long-cultivated species are now dying. Nikki Barker, a senior horticultural adviser at the RHS, attributes this to temperature fluctuations, noting that plants struggle with the combination of severe drought, a mild autumn, and a cold spell.
This year has seen the driest February in England for 30 years, followed by the wettest March in 40 years, according to the Met Office. April has brought lower-than-average temperatures and severe wind warnings, though forecasters predict an improvement with temperatures reaching 21C in London over the bank holiday weekend.
Concerns about volatile weather have led Chelsea Flower Show designers to swap some blooms for hardier varieties. Dave Green, designer of a garden commemorating Queen Elizabeth and celebrating King Charles, expressed anxiety that his vibrant plants may not flower in time for the show on 23 May, calling it “nerve-racking” given potential royal visits.
Sheila Das, a garden manager at RHS Wisley, advises planting a diverse range of species that can cope with both extreme heat and heavy rain. She emphasises adapting to climate variability by monitoring forecasts and being flexible, rather than sticking to a strict planting calendar.
The weather has also impacted businesses. The Horticultural Trades Association reports a 28% drop in overall sales at garden centres compared to last year, despite a 15% rise in catering sales. Pippa Greenwood, horticulture manager at the HTA, describes the start of the season as “incredibly slow”, with losses across the sector. Pubs with beer gardens have also suffered, with some reporting lower footfall and sales.
