How to Fertilize Egyptian lavender?
Weak lavender shrub feed monthly spring and summer growth

Egyptian lavender · Lavandula multifida
Grow in very well-drained, ideally alkaline, soil in full sun. May survive outdoors in mild, dry areas, otherwise grow in a container and overwinter under cover, or treat as an annual. See lavender cultivation for further advice
Weak lavender shrub feed monthly spring and summer growth