Please note, the contents of this blog reflect the views of its author, which are not necessarily those of the RHS. You can order seed of Penstemon ‘Twizzle Scarlet’ from Plants of Distinction. When I saw it in the summer I admired its prolific flowering, its bright colour and its natural elegance. This graceful hardy perennial is a far cry from the showy, large-flowered varieties that most gardeners are familiar with. Happiest in plenty of sun and in well-drained soil, ‘Twizzle Scarlet’ has a relaxed style that ensures it fits well into mixed and perennial borders where it should reach 70-80cm. For that’s its other claim to fame: this colourful perennial flowers well in its first year from a spring sowing. The result is a long season of flower from July to September - from seed sown earlier the same year. Needless to say, this is more than made up for by the tall upright stems along which flowers are crowded in clusters, producing a succession of bloom at each leaf joint. So what’s special about ‘Twizzle Scarlet’? Well, first of all its scarlet, tubular flowers are smaller and more slender than those of the more familiar varieties. And it’s won a Gold Medal from Fleuroselect, the Europe-wide flower seed trialling organisation. We tend to think of penstemons as large-flowered and blowsy, but the first of a new series derived from the American native Penstemon barbatus is rather different. Malvern Autumn Show - 23–25 September 2022.RHS Garden Wisley Flower Show - 6–11 September 2022.RHS Garden Rosemoor Flower Show - 19–21 August 2022 bell-shaped flowers held on remarkably long, strong and slender, 2 to 3 ft. Boasting half the foliage of older varieties, Twizzle Mix also sports twice the flowering stem, bringing you longer, more elegant blooming wands without.RHS Garden Hyde Hall Flower Show - 3–7 August 2022.RHS Flower Show Tatton Park - 20–24 July 2022.Plants are vigorous and low maintenance, and will perform best in full sun and well-drained soil.
The Coral, Purple, or Scarlet 1' tubular flowers from early-summer to fall will attract hummingbirds and bees in your garden. Before planting, amend the soil with humus, fine gravel, and compost to add pore space to improve soil drainage and appropriate moisture retention and mix these ingredients in to a depth of 12 inches. Avoid planting in locations with standing water.
RHS Garden Harlow Carr Flower Show - 23–26 June 2022.RHS Botanical Art and Photography Show - 9–29 April 2022.RHS Garden Wisley Spring and Orchid Show - 25–27 March 2022.
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