I'd probably suspect nitrogen deficiency, too.
My squash stayed in their initial pots too long, and were quite yellow when I planted them out, but recovered well after a week or two in the ground.
Two plants I gave to a plot neighbour and which he planted in unimproved soil looked rather yellow for quite a while, too, although they're recovering now (presumably as the roots have spread further).
My squash stayed in their initial pots too long, and were quite yellow when I planted them out, but recovered well after a week or two in the ground.
Two plants I gave to a plot neighbour and which he planted in unimproved soil looked rather yellow for quite a while, too, although they're recovering now (presumably as the roots have spread further).
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