I'm growing yukon gold potatoes. They've been growing like gangbusters, but this week I noticed some leaf yellowing and wilt on at least 3 plants out of 9.
Why are they yellowing? Is it anything to be concerned about? I check the soil daily, and it's damp down to at least 4 inches.
I'm in zone 6a, if that helps any.
The tops of those plants look really healthy. You should be mounding up the soil around them as they grow -- these are taller than I've ever seen, so I have no idea what leaves should look like that low on the plant. By mounding up the soil you encourage the plant to grow more tubers higher up. Every 6-8" of growth, mound up the soil around them. Leave 3" or so of leaves poking out -- they'll keep making more top growth. This is why you hear about "potato condos" or growing in tall bags or trash barrels.
