My toamto plants are getting to the end of their cycle and i have some questions. Now I had large brown rings around the tops of the fruits, what causes that and how can I prevent it next year (was looking through totamto solver photos and couldn't find it)? Also, any advice to prevent possible blight next year? Like heavily turning the soil over, mulch, etc that I can do during the Winter before I add new dirt, etc (I usually use the miracle-gro garden soil mixed with leaf mulch from the fall)?