An expert from Ashridge Nurseries stated on their blog that lavenders can receive a "light trim" in late February or early March, ideally completed by early March.
Most experts recommend pruning lavender plants in late summer after they finish blooming to remove spent flowers and old leaf growth.
When pruning any plant, including lavender, sharp, clean cutting tools are important to minimise the risk of disease and ensure a clean cut.
However, it's vital gardeners do not cut into woody stems as it's challenging for lavenders to produce new growth from old stems, reports the Express.
However, one expert has also suggested the plant can be trimmed in late February or early March.