One of the old collapsed raised beds in our allotment garden has a large volunteer squash plant growing in it. The plant is very vigorous and has large leaves with some white markings and a few developing squash fruits that are shaped like a butternut squash. The largest fruit is currently about 8" long a pale greenish yellow with faint green stripes. When it was younger it was light green with pronounced darker green stripes. Are all (or some) butternut squash striped when young, or is this likely some kind of hybrid squash? Although it is a huge plan with lots of flowers there seem to be very few fruit (only 3 or 4). Is there anything I can do to improve the fruiting, or is it too late for this year? Sorry, I thought I had a photo, but can't find it.