The snail vine’s (Vigna caracalla) scented blooms look a bit like (pretty) snail shells, hence its common name. It’s a climbing perennial, ideal for pergolas and fences in full sun and well-drained soil. Dig in plenty of compost before planting.
These are easy to grow by seed – sow them now (late spring/early summer at latest) for a long summer and autumn display.
You can collect your own seeds from the plant, which form inside what look like pea pods, for sowing next year. Old growth can be cut back in winter.
Seeds are available from Kings Seeds and Egmont Seeds.