My tomatoes are dying
I have a bunch of tomato plants. They are all about a foot tall, in five gallon containers, and, up until recently, they were looking healthy and happy.
Several days ago, some of them suddenly died. Leaves start to wilt, the stem loses its strength and the whole plant lies on a side and dies, the whole thing happens in a matter of two to four days. In this manner, I have already lost five plants, and one more looks like it's headed the same way.
Here's a plant that's in trouble:
Here's a dead plant:
No sign of any pests or insects.
Any idea what it could be? I don't think it's under/overwatering, and it seems to be too rapid for that ... My wife fertilized all containers generously with 15-15-15 fertilizer about a week ago, could that be the cause?