Position the lavender plants with plenty of space between them to encourage drying air circulation. Remove, or deadhead, spent blooms regularly for the entire blooming season. This prolongs the overall blooming duration and promotes bushier growth.

Should I cut the dead flowers off lavender?

It is good to cut the dead flowers off your lavender plant. Cutting the dead flowers off your lavender plant (​Lavandula​ spp.) is a good habit. Deadheading cleans up the appearance of the lavender plant, prevents the seeds from spreading and may prompt reblooming depending on the variety.

What happens if you don't prune lavender?

An annual pruning is an important step for long-lasting lavender (Lavandula spp. and hybrids) plants. Without it they grow a large, lanky, woody base that can split open — it looks bad and shortens the plant's lifespan.