same cukes i got. And your very near the same lattitude i have too here in michigan. I'd ask you if your fertilizing at all? I use
Espoma Brand fertilizer for my garden. I put this on all
plants, and everything is doing wonderful (despite being attacked by squash bugs a week ago.
My next question, and someone can followup on this one, is that i think 3 gallon bucket might be too little for cucumber
plants? My
plants will crawl up about 2.5' tall and have a circular base of 3 or so feet. I know for sure the roots go at least this becuz i can see them on the topsoil. Maybe the
plant is rootbound? Just a food for thaught thing.
Last of all. . cukes LOVE water. I was watering mine the same amount as all my other
plants. . . just keeping the soil moist. I was having ill looking cucumbers, and they were taking a long while to produce. I read on here that cukes abnormally LOVE water, and i begin to water almost 2x as much as i was before! I have great turnouts on cukes, and am picking 4-7 of them on a 3 day basis!
Good luck and let us know a lil more information! I havent yet OVERwatered my cucumbers. . . they seem to love every drop i give them! (fert every 2 weeks too! with that espoma stuff)