3. Water
As we mentioned above, the arch-nemesis of any lavender is dampness. If the roots of your lavender become too damp, your plant will die very rapidly. The death from dampness is even more rapid than that of freezing or drought.
As a matter of fact, overwatering is the most common cause of death for lavender plants. Water your lavender generously for the first week after planting it, but then take a more frugal approach once it has matured.
The best way to gauge how much water your lavender needs is to watch the soil. Only water your lavender if the soil has already drained and dried out since the last serving.
While you want the soil to be dry, you should never let the lavender get dehydrated. If you’re growing your lavenders in cooler climates, you’ll want to be very frugal when it comes to watering them unless you’re growing them during the summer.