New to San Antonio, the house has a row of Mexican Petunias in the backyard. They were beautiful all summer long, probably because we got a ton of rain in June/July. They have finished blooming now and are looking a bit dead. How do you suggest treating them for the winter? Do I cut them down to groud level and hope for regrowth in the spring? Or do I just trim to back to about 2 ft tall and see what they do? Any gardening advice is greatly appreciated for this new Texas gardener 😊