Can I grow a zucchini hill next to a yellow squash hill and have true fruit?
Can I Grow a Zucchini Hill Next to a Yellow Squash Hill and Have True Fruit
Certified GKH Gardening Expert
Squash may require as much as 500 feet between varieties to prevent cross-pollination. However, you only need to worry about cross-pollination of squash if you save the seeds for planting next year.
Here is an article or two that you may find helpful: https://www.gardeningknowhow.com/edible/vegetables/vgen/cross-pollination.htm