Sorry about photos not working, here is another attempt. http://i1020.photobucket.com/albums/af328/derbyka/Zucchini/IMG_2250.jpg

http://i1020.photobucket.com/albums/af328/derbyka/Zucchini/IMG_2318.jpg

http://i1020.photobucket.com/albums/af328/derbyka/Zucchini/IMG_2250.jpg

http://i1020.photobucket.com/albums/af328/derbyka/Zucchini/IMG_2443.jpg

http://i1020.photobucket.com/albums/af328/derbyka/Zucchini/IMG_2442.jpg

http://i1020.photobucket.com/albums/af328/derbyka/Zucchini/IMG_2437.jpg
http://i1020.photobucket.com/albums/af328/derbyka/Zucchini/IMG_2423.jpg
http://i1020.photobucket.com/albums/af328/derbyka/Zucchini/IMG_2440.jpg
http://i1020.photobucket.com/albums/af328/derbyka/Zucchini/IMG_2438.jpg

I'm sorry - -I just can't figure out hoe to get them to work

I looked at a sampling of your pictures and I think the plants look ok. I use those cat litter buckets as well but I would think they would be a bit too small for a full sized zucchini plant. In my garden last year the zucchini plants were over four feet tall. I use those buckets for peppers or plants about that size.

Do you fertilize? What kind of drainage is in the buckets? What is the soil mix you are using?

I don't see any problem with the leaf color. One presumes there are drainage holes, they are fertiized, etc. If this is true, you'll find those buckets are much too small. I use 15 or 20 gal nursery containers for the sole purpose of limiting the zuke-squash size so we don't get more than we can eat.

In order to show the foto, you want the HTML code 'img src':

{{gwi:37207}}

Dan

Okay, if this works it should be a picture of the older, worse looking leaves. About 3 leaves have actually died. this point, several of the female flowers/babies are shriveling up before even getting large enough to open and be pollinated. The male blossoms on the other hand are big and plentiful...
I planted them in a mix of fancy top soil (had some peat in it), coconut coir from my tarantula cages, rabbit manure, and oak leaf mold with some bone meal, a few tablespoon of fresh guano, egg shells, rinsed sea-weed, Epsom salt, and hermit crab food (because it is composed mainly of brine shrimp and sea-weed meal) mixed in. The containers each have two drainage holes 3/4 across about 2" up from the bottom.

Since planting, I have been fertilizing with nitrogen-only (9%) MG organic fertilizer about every 8-9 days (package says week to 10 days) at 3/4 cap per 3-4 gallons (package says 1/2 cap for 2 gallons). They get almost a full day's sun and it has been hot (mid 80s) the past couple of weeks here in central Florida. About 2 weeks ago, we had some torrential rains for a couple of days (over 4 inches a day), and I was concerned that the nutrients might have flushed out. It was about 1.5 weeks ago that I started noticing the pale coloring (whole plant but stronger going down towards the older leaves). Some of the leaves also have a very faint burn 1/8 to 1/4 inch in at the side edges. At this point, I have been watering the large zucchini plant 1/2 gallon a day (at least) when I can pick it up and it feels light. Because the container is so small for the size of the plant and the weather is so warm, I try to check it multiple times a day and water small amounts to keep it consistently moist. I rarely see much water come out the drainage holes. After doing research, I came to the conclusion that all this watering (and maybe the started zucchini production as the smallest plant that is not producing yet is the greenest) was depleting the nitrogen (the veins are either normal or too light - not dark). So, the past couple of days, I have been fertilizing with an extremely diluted amount (1/4 teaspoon or so in half a gallon) every time I water (which is every day).

{{gwi:37208}}

Torrential rain... maybe too much water?