[Nan_PA_6b]

I can't tell from the blurb how big the plant is for that squash. You might want to go with the squash that has the smallest footprint. BUCKINGHAM PATIO Zucchini Squash is about 2' diameter. It's on this page:
https://www.swallowtailgardenseeds.c...ash-seeds.html

Then you don't need to underplant.

Nan