Planted beautiful heirloom tomatoes for the first time. Planted them in good soil and put them in an underground 'cage' so the gophers couldn't get to them. They are huge, bearing fruit, but the leaves look like they are drying up; I noticed while watering that water is going down holes on the sides of the gopher baskets. . . looks like they might be eating the roots. Would this be the reason for the leaves drying up? Plus, my little cherry tomato is now all dried up and dead. I live in northern California.