04/27/2026
Did you knowā¦? There are new ways weāre planting these days. Know better and then do better.
A zucchini plant in an open bed is the easiest target in the garden for the two pests that end more squash seasons than any disease ā squash bugs and squash vine borers. Both locate their host by sight and smell. A large-leafed squash plant sitting alone in bare soil with no aromatic interference and no visual competition is a billboard advertising itself to every pest within flight range. šæ
The companions that change the equation around zucchini and summer squash work on three fronts: aromatic confusion that makes the squash harder to find by scent, pollinator attraction that ensures every female flower gets visited during its single-morning bloom window, and trap crops that intercept pests before they reach the main plant.
Nasturtium trails across the bare soil between squash hills and serves as an aphid trap crop. Aphids colonize the nasturtium first and leave the squash alone. The bright flowers also attract pollinators into the squash zone ā critical because zucchini flowers open for a single morning and any flower that goes unvisited by a bee produces no fruit.
Radish interplanted between squash hills matures and harvests before the squash canopy closes over and the sharp volatile compounds in the radish foliage deter squash bugs and flea beetles during the vulnerable first three weeks after transplant when young squash plants are most susceptible to feeding damage.
Marigolds at the bed perimeter suppress root-knot nematodes through root exudates and add aromatic confusion above ground. French marigolds are the effective variety ā large African types produce less root exudate per plant. Tuck one marigold every twelve inches along the front edge of the squash bed.
Dill planted at the sunny end of the bed attracts parasitic wasps and ladybugs that prey on squash bugs and aphids. Let the dill bolt to flower ā the flat yellow umbels are landing pads for the beneficial insects that do your pest control for free. One important boundary: keep dill away from tomatoes in adjacent beds because mature flowering dill can inhibit tomato growth.
Sunflower at one end of the bed serves as a pollinator beacon visible from across the yard. Squash flowers are low to the ground and rely on bees that are already foraging nearby to discover them. A six-foot sunflower towering above the squash canopy pulls bee traffic from every direction straight to the zone where squash flowers need it most.
Oregano spreading as a low aromatic mat between squash hills releases volatile oils that disrupt the scent signals squash vine borers use to locate squash stems. The female vine borer moth navigates by smell ā she finds the squash stem, lays eggs at the base, and the larvae bore inside. An oregano mat around the stem makes the stem harder to locate.
Borage planted within three feet of the squash draws bumblebees with its bright blue star flowers. Bumblebees are the most effective squash pollinators because their large bodies transfer more pollen per flower visit than smaller bees. A single borage plant measurably increases fruit set on neighboring squash.
White clover sown between squash hills fixes nitrogen into the root zone where the heavy-feeding squash needs it most, covers bare soil that squash bugs use for egg-laying, and provides continuous low-level flowers for pollinators from spring through fall.
Tansy at the bed perimeter provides documented squash bug and cucumber beetle repellent properties through its strongly aromatic foliage. Plant tansy at the edges only ā it spreads aggressively by underground runners and needs a firm boundary.
A squash bed that smells only like squash attracts everything that eats squash. One that smells like oregano, marigold, tansy, and dill attracts the things that eat the things that eat squash.
The nose knows. Confuse it.
Kathysflowersandgardens.com
