I had a beautiful Provence Lavender that had grown to a 5x4 shrub. Lasted about five years, then just died off. Have tried Grosso, Munstead, Mini Blue, Sarah, and a couple others that I can't remember right now and each died off the first year regardless of if it was in ground or in a pot. I do have a Spanish Anouk that is five years old, but it is unhappy and has only bloomed two years out of the five. Plus, it does NOT like drought. My soil is nearly all heavy clay, which is why I kept most in pots, but the Provence was planted in the small area that has a sandy soil mix (previous owner leveled a slope). The Munstead was planted in that same area and died off in four months. Any ideas about how to be more successful with them?