Companion Planting & Garden Value: Summer Squash (Yellow)
Cucurbita pepo
Spacing: 1 per square foot. Mature height: 2-3 ft.
Plant these nearby
- Nasturtium: An Iowa State study found nasturtium and marigold both reduced squash bug and cucumber beetle damage, drawing the pests onto themselves as a trap crop instead of the squash. (source)
- Radish: Interplanted radish is reputed to deter squash vine borer, though the documented trap-crop research for that pest points to Blue Hubbard squash specifically, not radish: treat this pairing as garden tradition, not measured evidence.
Keep these apart
- Zucchini: Crowding same-family squash varieties together increases powdery mildew spread and risks cross-pollination if seed-saving.
Common pairings, answered directly
- Can I plant summer squash (yellow) next to nasturtium?
- Yes. An Iowa State study found nasturtium and marigold both reduced squash bug and cucumber beetle damage, drawing the pests onto themselves as a trap crop instead of the squash.
- Can I plant summer squash (yellow) next to radish?
- Yes. Interplanted radish is reputed to deter squash vine borer, though the documented trap-crop research for that pest points to Blue Hubbard squash specifically, not radish: treat this pairing as garden tradition, not measured evidence.
- Can I plant summer squash (yellow) next to zucchini?
- Better not to. Crowding same-family squash varieties together increases powdery mildew spread and risks cross-pollination if seed-saving.
Lay this out in the Garden Designer →
%3A%20which%20plants%20to%20grow%20next%20to%20it%2C%20which%20to%20keep%20apart%2C%20and%20the%20reason%20behind%20each%20pairing.)
Pin this for later
Companion planting for Summer Squash (Yellow): which plants to grow next to it, which to keep apart, and the reason behind each pairing.
Save to Pinterest