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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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.
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.