Zucchini leaves getting extremely pale
When I planted my Zucchini the leaves were dark green. And slowly but consistently the leaves have really taken on a yellowish-green, to the point where the entire plant a really, really pale green and very unhealthy looking. Not just the old leaves, but the new leaves as well. The plant still seems to be growing fine, but I'm really concerned.
Could this be the product of overwatering? What else could be causing this? What can I try? I'm getting pretty desperate!
Thanks for the help!