"NT" wrote in message

Growing Pumpkin Delica F1, which are small dark green fruits. Can
these be harvested once they're upto size, or is it necessary to leave
them on the vine all summer? Some are getting destroyed by pests, so
harvest now would be good if its a workable option.

I don't know what this hybrid pumpkin is, but the general rule with pumpkins
is that if they sound hollow when you rap on them with your knuckle (like
knocking on a door) they're done and can be harvested. The other loose rule
of thumb is that if something is eating it, you can too (but that is a much
looser rule as some animals will eat anything at any time).