Can you grow passion flower in the UK? For those on heavy soils (such as clay), passion flower breeder Myles Stewart Irvine (who has raised the resilient Riverside hybrids, including ‘Damsel’s Delight’ and ‘Snow Queen’) recommends potting up young plants in large, deep containers for their first summer to encourage good root growth and overwintering them indoors, before planting out the following year. It’s vital not to start off with an overly large container, if you intend to keep your passion flower as a pot plant – for instance, on a roof terrace.