jesshug
Newly Registered
Posts: 5
Joined: Wed May 22, 2013 12:46 pm

Zucchini Leaves Yellowing w/ Brown Spots

My Zucchini squash plant is in a raised bed planter. I have given it diluted fish emulsion twice. It gets plenty of sun and water. However, recently the leaves started turning yellow and now I'm starting to see brown spots. What should I do?
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imafan26
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Posts: 13961
Joined: Tue Jan 01, 2013 8:32 am
Location: Hawaii, zone 12a 587 ft elev.

Yellow leaves can be a couple of things

Too much water will make leaves yellow the spots sound like some kind of fungal disease. If it is occurring on the lowest leaves and not all over. Remove the worst leaves, they probably can't be saved anyway and start a preventive anti fungal spray. Some people have luck using a milk spray, I like to use sulfur or baking soda sprays.

It looks like you have mulched well, so make sure you are watering only when you need to. the mulch will hold a lot of water and as the day heats up, it promotes a humid environment.



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