On Apr 11, 3:57 pm, "Zimmy" wrote:
Hi, I'm a novice gardener. I was planning on trying water melons and
pumpkins in my garden this year. When I mentioned this to my family
at Easter, My Great-Uncle told me he semed to remember reading
somewher that watermelons and pumpkins might cross pollinate and that
I should looki into it before planting them next to each other. Does
anyone know if this is true? If so, how might it affect the actual
watermelons or pumpkins? The spot where I was thinking of planting
them is a patch about 22' x 10' (and if they overgrow out of that
area, so much the better)

No need to worry at all. The only common plant that crosses with
watermelon is citron. They won't cross with cantaloupes cucumbers and
the like. Neither will they cross with squashes. Many of the squashes
will cross with each, but unless as someone mentioned, you are saving
seeds it does not matter.