Hello all, first time in a forum like this
I was wondering why are two of my summer squash runts and yellowing on the edge, but one summer is growing big and a winter squash is getting on it's feet?
My soil started out the start of winter as hard clay, and I slowly amended it over winter with fallen leaves, hummus/manure, and my own compost.
This summer squash that is the worst off, has continuously had it's bigger leaves yellow, brown, and then curl in on itself and die through it's life. Is this pest, sun, or a deficiency??

Where in Tx are you? Summer squash are very prone to fungus in hi humidity, they sound like they are reacting to your soils and moisture, also susceptible to the dreaded squash vine borer moths.

I'm in North Texas, an hour away from Dallas. They don't have any sign of fungus, and may just be reacting to the soil.
My three other squashes have also bloomed while they're small, I heard I should pluck the flowers for now. Should I?

Following. Im in the same boat down here in Houston. I grow zucchini in a pot and always unsuccessfully. I'm trying again this year. The leaves yellow so I clip them off. My 6 wk old plant has 1 youth leaf left (but showing several promising leaves to come) This will be my last year trying squash. Idk what ails it??

I mixed my crappy clay complex soil with manure and hummus, and lots of decomposed leaves over winter. Then I buried some half decomposed food scraps/compost a foot under the plots.
Was hoping my efforts would be enough as well. My three squashes are doing okay now, but I'm afraid some will start yellowing just due to how they started

An hour south of Dallas? squash has 7 male blooms before you get 1 female bloom. It doesn't LOOK like a fungus, but they succumb easy to moisture. They need dryness, when I could grow them, I planted on a hill, watered into a hole beside the plant. Yellow leaves, not enough fertilizer, too much water- and it is actually natural for the older leaves to yellow and drop off, but not before at least 4 or 5' of vine. Again, the moths are horrid this year and squash vine borer moths (wasps?) lay their eggs inside the hollow stem of the squash and it is next to impossible to survive that. We dodge seasons flo by trying to time our squash vines by the life cycle of that moth. Just like bees, bugs are attracted to different colors- yellow, red, blue...and they can spot your plant because of that. I would suggest trying a different squash, tromboncino, perhaps, or chayote? The efforts of gardners to raise squash has been a life of all sorts of trials.

@kittriana Good to know about the 7 male flowers. And I'm probably over watering. Duly l noted.

A plant friend suggested to continue hilling soil around the squash base. I did that to save my poor zucchini plant. Hopeful it will work.

Remember when we were taught to grow watermelons up off the ground a foot or two? The base of the plant. I did my squash, cantaloupe, potatoes same way.

I've realized that all of my squash are stunted and went in when it wasn't warm enough. They are producing female flowers and male, but the leaves are not big at all. Is there any way to save this?

Leaves aren't usually what is affecting the stunting. Have you fertilized? Can you show us a pic?

If your squash is still alive and survived the vine borer, feed it some liquid seaweed. It should perk up and remove the spent flowers, failed fruit, and yellow leaves. Burry the exposed stem to get new roots to form.
Good luck
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Hello everyone!

I hope you are all staying safe and healthy during these times.

I'm new here and just created an account on this forum specifically because I'm having issues with my squash plants. I planted them from seed on May 5th. As of last week, I've noticed that the edges of the bottom most leaves are turning a brownish-grey, shriveling up, and then falling off. The issue is working its way up the plant so I think it may be a fungus from the soil, though I'm not sure. If it is actually a fungus from the soil, I have no idea which type or how to treat it...

Here is what it looks like as of today. One of the photos is of something that seems to be an orangey-white fungus, though I'm not sure. For reference, I live in South Florida since other posts above have mentioned that squash plants don't quite fare well in high humidity. Any suggestions would be greatly appreciated!

Ok, being new, I know you weren't playing with your 'MY Profile' button: dirt with wood in it has constant decomposing fungi of all natures. Usually fungi aren't the issue. It is viruses that do your plant in. Looks like sunburn, watering issues, lack of a dose of garden fertilizer. Squash like being started before June as well - maybe March here in the deep south. Does your plant get ANY shade esp 1100am thru afternoon? Pots are lots hotter than the ground, so get that pot some shade. They also love water, humidity won't support a squash plant. Too much sun will sunburn small plants.

Wow you responded so fast!

I've since moved the squash from the porch and put it in the walkway where it gets about 2 hours of direct sunlight. I previously had the squash on my porch and actually only got about 3 hours of indirect sunlight.

I also have begun watering it more.

The only reason I was wondering if it was a fungus was because the same thing seemed to be happened to my spinach and chives. Whatever it is that was affecting the spinach, was too far gone but the squash was still salvageable!
I'll keep following the thread for more tips and just to stay informed. Thanks for your help!

P.S. please ignore the sad looking basil. I forgot out in the sun but I watered it and it revived up again.