Deadheading lilies will encourage more flowers to form and prolong their display. It will also divert energy away from seed production, which can reduce flowering performance in subsequent years. If you’re growing martagon lilies, don’t deadhead these as these will gradually self-seed.
You Will Need
Tidy up the lily flowerheads once the petals have fallen, trimming them back to just above a pair of leaves.
When tidying up lilies, leave as much main stem and as many leaves as possible as these will help the bulb build up its food reserves for next year.