Click below to listen to my Garden Bite radio show: Yellowing tomato leaves
My tomato plants are really looking “mostly” good. I’ve even harvested a few ‘Mighty Sweet’ cherry tomatoes. However, the leaves on one of my plants are yellowing. I admit, not all my plants remain glorious throughout the growing season! I did some checking as I hadn’t had that issue before. This is the second season of growing vegetables at my new home. The yellowed leaves are all at the bottom.
As I’ve said before, diagnostics can be a difficult thing. At the time of this writing, the leaves had only yellowed. There was no sign of brown spots or rotting fruit. I thought perhaps it was not enough nitrogen in the soil. I haven’t fertilized them since planting. However, in less than a week, the bottoms of some of the fruit have rotted and I’ve seen some brown spots. Could be blight. I’ll add that only 2 of my plants have this and they are both heirloom tomato hybrids from Burpee. Check out this link from the Colorado State University extension on Recognizing Tomato Problems.
This video is from a show I did last year called ‘Dig In Minnesota’ and features Tom McKusick the Publisher of my favorite magazine “Northern Gardener”. Tom grows up to 80 varieties of heirloom tomatoes! He KNOWS what he’s talking about!