in the early morning do you see bees visit the flowers this is the number one cause for them not to grow cukes, is there not getting pollinated and with the declining bee populations it is likely so if you have no bees then take a male flower (the one with no tiny cuke at the base) take it and rub the inside part in the female (the one with a tiny cuke at the base) very lightly this should spread the pollen around and get things started. you can also try and plant purple clover close by to attract more honey bees they seem to like it pretty well

I would guess angular leaf spot or mosaic virus. But I'm pretty new to gardening, and only know this because I have what appears to be the same problem, only my fruit turn out fine, except my cucumbers are oddly shaped. I've been treating with every organic suggestion and so far none have cured it, and only stave off total plant death. Sorry, good luck.

We have bees year-round so I imagine you will too. They really are starved for something to eat in the winter and spend the whole day foraging. I try to keep some sort of cool-season flower, cover crop or weed blooming for them. Sometimes I use hummingbird feeders without bee guards as bee feeders in winter. I've noticed for well over a decade now that when I put out cracked corn for the mourning doves, the bees feed on it, though I am not sure how they do it. That's especially true in the dead of winter, but also in every other part of the year as well. Buckwheat is wonderful and clover attracts many bees and other pollinators as well. Clover also is a cool-season crop, but I have little bits of clover here and there in shady areas that survives almost year round. Sometimes it dies back in mid-summer. Some of it was blooming last week behind the barn but I haven't looked at it lately because all I've done for far too long is harvest, can, harvest, can, harvest and can. It is amazing how much changes in the garden if you are only stepping foot in it a couple of times a week to harvest. I had a volunteer plant pop up in the back garden about a month ago. It is an Armenian cucumber. The cool thing is that it popped up in the middle of a hill of summer squash plants and it is growing over them, through them and around them. Their foliage is mixed it with the cuke foliage, and these plants are producing a nice harvest. I also haven't seen a squash bug or SVB near them. (Now that I said that, I'll go out tomorrow and discover SVBs have killed them all because that is how gardening works.) Say "I haven't seen a cucumber beetle all year...." and a million show up the next day. It will be interesting to see if the squash pests avoid the squash plants growing with the Armenian cuke (which, you may remember, is a melon and not a cucumber). I've often wondered if I could hide other summer squash and winter squash plants by planting them in the middle of Seminole plants. I haven't really tried it because the Seminole is such a rampant grower that I think it likely would smother any other nearby plants. Bon, Fred often complains to me that he doesn't have bees and I just don't get it because he is less than a mile from us. I know he does have them when the fruit trees are blooming. My garden is so filled with bees and wasps that some of my friends don't want to step foot it in. I work out there in it all the time and haven't been stung by a bee or wasp in the garden in years. Of course, if I was allergic to them, their presence would be a problem. And, of course, often people who don't have plentiful bees and pollinators have brought it on themselves by spraying broad-spectrum insecticides, which is something I avoid doing specifically for the sake of the bees and other beneficials. I planted my cukes late, trying to ensure I wouldn't have to start canning pickles while trying to finish up the canning of all the tomatoes. I checked the cucumber plants this morning and think it is going to work out as planned. The tomato crop is really winding down and I'm through canning salsa, and the cucumbers are in bloom. That is, of course, assuming disease or pests don't suddenly hit the cukes. In a garden, anything can happen. Dawn

The chewing of those leaves could be from slugs or snails, mollusks that you would not see in the daytime as they are active at night. The plants also look like they have a nutrient deficiency. kimmq is kimmsr