Lily of the valley 'Dorien'

Keep in mind when planting that Dorien is thought of as hardy, so it can be safe to leave outdoors for the majority of winter (although if in doubt, using a row cover is often a good idea).

Aim to sow 0.94 inches (2.4 cm) deep and try to ensure a gap of at least 7.8 inches (20.0 cm).

As Dorien is hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.