RHS Names Top Summer Plant for UK Gardens
The Royal Horticultural Society (RHS) has identified Verbena bonariensis, also known as Argentinian vervain or tall verbena, as the most sought-after plant in UK gardens this summer. Compiled from data submitted by users of the RHS Grow app, the list reflects a trend toward drought-tolerant species as Britain endures frequent heatwaves with temperatures exceeding 30°C and nearing 40°C.
Verbena bonariensis features distinctive lilac blooms and can grow up to two metres tall. According to the RHS website, the plant appears from summer to autumn and produces numerous branched clusters of small, lilac-purple flowers that serve as an excellent nectar source for pollinating insects. Butterflies, bees, and hummingbirds are particularly attracted to its flat-topped clusters of nectar-rich, tubular purple flowers.
Growing Conditions and Care
The RHS advises growing Verbena bonariensis in moist but well-drained or well-drained, moderately fertile soil in full sun. In cold areas, a dry winter mulch is recommended for protection. However, gardeners should be cautious as the plant may become a nuisance due to prolific self-seeding if not well managed.
RHS chief horticulturalist Guy Barter praised the plant, stating: "Around the year 2000, garden designers switched to a naturalistic meadow-y type effect and Verbena bonariensis does that to perfection." Mail journalist Ciar Byrne added: "Partly heat- and drought-tolerant, V. bonariensis, or purpletop vervain, is a perfect plant for hot summers."
Additional Gardening Tips for July
Beyond planting Verbena bonariensis, gardeners can take other measures to protect their plants during warm weather. According to Gardeners' World, July is an ideal time to deadhead flowers—removing blooms as they begin to wilt. This process encourages other parts of the plant to flourish, protects foliage, and prevents seed formation.
Gardeners have also been advised to hang old CDs in their outdoor spaces to shield fruit and vegetable crops from birds. The gardening page for Food For Trees & Africa explained: "Did you know that by hanging old CDs around your food garden, you'll startle birds with the reflecting light and keep them away from your vegetables and herbs?" The trick involves hanging discs loosely so that the slightest breeze makes them spin and catch the sun's rays, and periodically changing their location to prevent birds from becoming accustomed to them.
