I'm not ruling out pesticide damage, as mentioned to me in the other thread, but would that cause such a rapid deterioration of the plant? I only sprayed Sevin (liquid spray) on it once, and I didn't think I was that heavy handed, as I was worried about damaging the plant. (Believe me, I will NEVER use that stuff again!)

Here is a pic of a leaf from a few days ago and the same leaf this morning. You can see how the yellow patches are growing. Even the newer, smaller leaves on top are starting to develop spots. The only ones that seem to be ok thus far are the very small leaves underneath.

Few days ago:

This morning: It's the big yellowing leaf on the lower right.

The zucchinis themselves don't seem to be growing much now either, where they were doubling in size within a day or so just last week.

I just can't figure this one out. I wasn't fertilizing very strong, so I initially thought about it being a nutrient deficiency of some sort, considering it is such a large plant and has been drinking up so much water.

I did cut off all of the other leaves that had yellowed so much that they turned brown and started to shrivel up. I left the stems in tack and just removed the leaves.

Any other thoughts on what is causing this or how to fix it?

Thanks!

I've used Sevin many times on my flowers and other plants and never had much, if any damage from that.

John

The problem with the yellowing is that it's not just the old growth. The new growth is developing the yellow patches as well, it just started with the bottom leaves and worked its way up.

I don't think it's a watering issue, though if it were it would be under watering, as we've had some high heat and the plant has become a bit droopy a few times, but the marked change in color, the yellow patches, smaller leaf size, and stagnant zucchini growth tells me that something is going on with this plant, considering it was growing insanely fast and producing faster than I could come up with things to do with the zucchinis!

I'm going to fertilize again today and see what happens.

Thanks!

1. How long has it been producing lots of zucchinis for? Is it possible that the plant is just at the end of it's lifespan?

2. What size is your pot? Is it possible that the root system is just too small for that planter? My zucchini is in a 20" planter that is about 14" deep and I've been told I would have been better off to get the 25" one because of the sheer size of a zucchini.

Kathryn