The Royal Horticultural Society has advised home gardeners to discontinue growing cauliflower, citing climate changes that have made the vegetable increasingly difficult to cultivate in the United Kingdom. The recommendation comes as England faces exceptionally challenging growing conditions, with this summer marking the country’s hottest on record according to provisional Met Office data. Temperature peaks reached 38.1C at Kew Gardens in London on 13 August, while June was confirmed as the nation’s hottest since records began in 1884.
Brassica crops more broadly are expected to deliver poor yields across the country this year, with agricultural experts describing the outlook as potentially among the worst on record. The RHS notes that cauliflower and related varieties such as calabrese are particularly vulnerable to heat stress and drought, as they require substantial water and cool conditions to develop properly. When exposed to high temperatures, these plants fail to form adequate heads and experience overall growth failure. Many RHS horticulturists had already abandoned cauliflower cultivation years ago due to consistent lack of success under recent climate patterns.
RHS chief horticulturist Guy Barter suggested that gardeners should replace temperamental brassicas with equally nutritious and flavorful alternatives suited to warmer conditions. Purple sprouting broccoli, kale varieties with deeper root systems, and heat-tolerant crops have emerged as viable substitutes. RHS garden staff have reported strong results with tomatoes, peppers, aubergines, and warm-weather vegetables including okra, chillies, and yard-long beans. Some regions now support outdoor cultivation of melons and watermelons where water access permits.
Horticulturists working across RHS facilities have documented their transition away from traditional brassica cultivation. Staff members reported that spring sowings of cauliflower bolted prematurely due to heat before plants could be established, while late-season attempts yielded inconsistent results. The shift represents an adaptation to persistent climate patterns rather than temporary variation, with recommendations focusing on reducing irrigation demands while maintaining harvest reliability and nutritional value.
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