Biennials you can sow this summer
01.08.2023 - 15:39
/ theenglishgarden.co.uk
/ Clare Foggett
Biennials are plants that have a two-year life cycle. In the first year, they grow leaves and in the second they flower, before setting seed and dying. June and July are the ideal months to sow their seed. You’ll have young plants ready to go in the ground where you’d like them to flower by early autumn. Then, next spring or summer (depending on which biennial you’ve grown) they’ll produce their flowers.
After flowering, lots of biennials will self-seed themselves around, ensuring you always have them popping up in your garden. The trick is to deliberately sow your biennials for two years running to ensure you enjoy their flowers every summer, and not every alternate summer.
There’s a biennial for almost every garden: ones for shade or sun, for cutting, for scenting your patio, for early colour, even biennials for gardeners who like the tropical, exotic look, such as echiums.
In its first year, evening primrose (Oenothera biennis) produces a rosette of leaves; in the second, a flower spike clothed in fragrant yellow flowers that open in the evening, hence the name. It’s good at seeding around, and moths, butterflies and bees all love it.
The silver-grey leaves and stems of Lychnis coronaria set off the magenta pink flowers to perfection and it flowers over a long period. It’s great for the middle of a border at 80cm tall; team it with silver astelia or Convolvulus cneorum.
From left to right: Oeneothera biennis; Lychnis coronaria; onopordum’s thistly flowerhead; Mexican hat, or ratibida Photos: Shutterstock
Onopordum nervosum is silver too, producing a large rosette of architectural spiny silver leaves in the first year (don’t attempt to weed anywhere near it without wearing stout gloves), and pink-purple thistle flowers in