I had about 6 beautiful lavender plants that were thriving around my pool cage. All of the sudden, they have apparently all died. Its now the rainy season. They sit in sandy mixed with potting soil, in the ground. Too much rain? Will they grow back in the fall when the rains let up? Any help appreciated. I am going to cut them down, and don't want to pull them out if they might come back. I LOVE the bees and butterflies that came around because of them!