Another Walkthrough of Parthenocarpic Cucumber Trial

My open-pollinated parthenocarpic cucumber variety trial took quite a while, but the results are finally in. As a review, parthenocarpic means that the female flowers will set fruit (but not seed) without pollination. Another term I use is gynoecious, which means that the plant produces all (or nearly all) female flowers. As I only grow open-pollinated cucumber varieties, the gynoecious ones I am mentioning must have at least a few male flowers to produce seed.
Here they are mostly alphabetically:
Beit Alpha: Parthenocarpic
China Jade: Nearly gynoecious (parthenocarpic only after a lot of aborted female flowers)
Diva: Parthenocarpic (beginning after a lot of aborted female flowers)
English Telegraph: No parthenocarpic traits yet, several aborted female flowers.
English Telegraph Improved: No parthenocarpic traits yet, few female flowers.
Monika: Nearly gynoecious (parthenocarpic only after a lot of aborted female flowers)
Muncher: I was told this variety has parthenocarpic tendencies. I have not observed them yet. About 4-5 aborted female flowers.
Suyo Long: A couple aborted female flowers. No parthenocarpic tendencies to speak of.
Sikkim: All male flowers so far. Very late producing variety.
A cucumber-melon: Meloncella Tonda di Galatina: Parthenocarpic (beginning after a few aborted female flowers)
So here are the results of those that made the cut (or at least kind of did):
Beit Alpha: Most parthenocarpic
Meloncella Tonda di Galatina: Highly parthenocarpic
Diva: Parthenocarpic-ish. Once parthenocarpic tendencies set in, it does well producing good-looking fruit.
China Jade: Very promising. Always trying to set fruit. Only occasionally does. I love the nearly gynoecious tendency.
Monika: One set fruit. Very productive and nearly gynoecious, but not fully gynoecious.
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[@madammoonbeam5070]

You're supposed to grow parthenocarpic cucumbers in isolation. If they cross pollinate, they curl, yellow, and fall off.

[@CucumberShop]

Thank you for your engagement in this video. I'm not sure where you learned that information, but normally pollinated cucumbers are the only ones that set fruit. Others would behave as you described. Parthenocarpic cucumber varieties are able to set fruit, but not seed, without pollination. The majority of the varieties I was trailing were touted by some seed companies as being able to produce fruit without pollination. What seed companies say is not always true. That is why I was trialing these plants in a greenhouse without any pollinators to verify these claims. Thank you again for your interest.

[@gloriashelton1504]

Looks like you need to fertilize we use fish emulsion

[@CucumberShop]

While I have used fish emulsion, it has never really done well in dilution on my soil. It has generally caused disease. I am not sure why, but I have had much better success in incorporating fish emulsion with my compost and putting finished compost on my plants. The primary issue with these plants is that I am growing in just a couple gallons worth of soil using hydroponic baskets. These work for experiments, like this one - but not as a long-term growing solution. For my real gardens, I grow outside of the greenhouse.

[@nathanho233]

Hi Jay. Why are the leaves of the plants' yellow?
I planted some of your cucumber melons back in April. The long type cucumber melons are flowering right now. It will likely be a month before I see fruit. I am going to transplant Garden Oasis (Beit Alpha type), Tasty Green and Silver Slicer at the monsoon. I just seeded them in cups today. It's the first time I'm growing regular cucumbers. Did you like to plant them in July or later when you were in Tucson?

[@CucumberShop]

Good Morning Nathan. My experience has been that Cucumis sativus (even Beit Alpha) prefer cooler nights than C. melo, so I would typically grow them in the spring or fall. Not that you cannot grow them in the mid-summer, but they typically do not thrive in the heat the way C. melo does. I believe my leaves were yellowing because the roots were getting too warm in the greenhouse and because I wasn't giving them enough water.

[@nathanho233]

@@CucumberShop I finally got around to getting some shade cloth, so the plants will be in near constant shade. If they slow down, I'll plant them again in August. There is so much variety of cucumbers to explore. Thanks for the tip.