Zucchini

I have 2 Zucchini and 1 yellow squash plants. Only one Zucchini plant is doing good. It flowers well but because of non-pollination, not a good amount of zucchinis. I have got 4 so far that too hand pillinated ones. And moreover both the male and female flowers are not opening at the same time. The plant is huge with lovely bright yellow flowers. I am not going to plant these next year, time for experimenting with some other veggies.