When the weather is right, cukes grow fast, so if you direct-sow them again, they'd mature about as fast as the ones you planted earlier. You don't list your zone in your area, so it's hard to know if you set them out too soon or if they're suffering from all this rain much of the country is having. I wouldn't give up on the variety and get another one. Just re-plant some more seeds and watch them grow.

Are those only the newer leaves? If so, has anyone used Roundup (glyphosate) nearby? Most of the affected leaves are new but I do see some damage at the edge of the older leaf in the center of this photo Roundup hasn't been out of shed since early spring cleanup. I did spray the cage with Neem oil a week ago when I saw a few spots of mildew. Thinking about it more, there may have been some overspray of a weak Miracle-Gro/soap mixture that I used to combat spider mites on nearby vines. I forgot to note that in my journal and now I and can't remember whether it was last Thursday or Friday. Could that have caused this? Please post an image of the entire plant so that we can see what is affected and where. I hope this will do. I have 9 cucumber plants in a home-made self watering container. They were doing fine on Friday but now 2 plants have this discoloration. Most of the affected leaves are close to the growing tip and some of the unfuled leaves on two plants seem to be discolored in the same way. As always, thank you for your help. This post was edited by Athenian on Mon, Jul 22, 13 at 14:55

My plants are doing this same thing this year. They were growing so nice and then within a few days they look like the above pictures. I have them in a raised bed with tomato plants so I am wondering if I should pull this plant out and toss it or leave it until the fruit that are on the plant can grow until ready to pick. I have them vining up a few bamboo poles and it is working well. My plants have a few nice cucumbers on them and the lower leaves are the ones I have already pulled off. I do not want my plant to infect my tomatoes. I need the opinions of the forum here. I water well and only the bed, not the plants. The tomato plant may be crowding the cuke plant but I know its not causing the leaves to die. I have been spraying with an insecticide soap but the rain may wash that off. Should I use something stronger or just let the plant go?

I'd first check the undersides of the leaves for possible insects. Spider mites and/or aphids can create that appearance. Then treat the plant with a truly effective fungicide to try to stop the few spots of powdery mildew before it gets worse. Dave