Lavender benefits from fertilization only once or twice a year.
Lavender’s preference for dry, gravelly, nutrient-poor soil sets it apart from other loam-loving vegetables and flowers. It even thrives on a bit of neglect.
Because of this, lavender doesn't need much in the way of fertilizer. For established lavender plants, the best time to fertilize is in early spring just as new growth begins, and again in early fall after flowering has ended. You can encircle the plant with a two inch thick ring of compost to slowly seep into the soil over time.
Avoid fertilizing during the winter months when the plant is dormant.
When and How to prune lavender resource article: click here.
Because of this, lavender doesn't need much in the way of fertilizer. For established lavender plants, the best time to fertilize is in early spring just as new growth begins, and again in early fall after flowering has ended. You can encircle the plant with a two inch thick ring of compost to slowly seep into the soil over time.
Avoid fertilizing during the winter months when the plant is dormant.
When and How to prune lavender resource article: click here.
It's important not to over-fertilize lavender, as this can lead to excessive foliage growth at the expense of flowers. Excess fertilizer can also become toxic to the lavender's root system.