Zucchini Companion Plants: What to Grow and What to Avoid

Zucchini is one of the most generous plants in the summer garden, and the neighbors you set beside it can decide how heavily it produces. The best zucchini companion plants pull in the bees your plants need to set fruit, lure squash bugs and beetles away from the leaves, feed the soil, and make smart use of the space around those big, sprawling plants. Here is exactly what to plant with zucchini, what to keep away from it, and how to lay it all out.

Quick answer

Plant zucchini with: beans, peas, corn, nasturtiums, marigolds, borage, radishes, and flowering herbs like dill and oregano.

Keep zucchini away from: potatoes and fennel, and give other cucurbits like cucumber, melon, and squash plenty of room for airflow.

The best companion plants for zucchini

These are the companions that earn their place in a zucchini bed. Each one solves a specific problem, whether that is pollination, pests, soil, or space. If you have grown other members of this family, you will recognize a lot of the same logic from our cucumber companion plants and watermelon companion plants guides.

1. Beans and peas

Beans and peas are nitrogen fixers, working with soil bacteria to pull nitrogen from the air and leave the soil richer for their neighbors. Zucchini is a hungry feeder, so that steady supply of nitrogen supports strong, leafy growth and heavy fruiting. Beans and peas also take up little room and are easy to tuck in around the base of your plants.

2. Corn

Tall corn gives zucchini vertical structure and a little light afternoon shade during the hottest part of summer, while the big zucchini leaves shade the soil below and help suppress weeds. It is a classic pairing in the spirit of the Three Sisters. Plant corn to the north side so it never shades your sun-hungry zucchini.

3. Nasturtiums

Nasturtiums work as a trap crop, drawing squash bugs, cucumber beetles, and aphids to themselves and away from your zucchini leaves and fruit. Their bright, open flowers also attract bees and other pollinators, which zucchini relies on to set fruit. As a bonus, the leaves and blooms are edible and trail nicely as a living ground cover.

4. Marigolds

Marigolds are a garden workhorse for pest control. Their roots help deter root-knot nematodes in the soil, and their strong scent confuses many pest insects while the bright blooms attract beneficial ones like ladybugs and hoverflies. Plant them around the edges of the zucchini patch for easy, colorful protection.

5. Borage

Borage may be the single best flower to plant with zucchini. Its true-blue, star-shaped blooms are a magnet for bees, and heavy bee traffic is exactly what zucchini needs to pollinate well and set full, evenly shaped fruit. Borage is also believed to deter squash bugs, which makes it a natural fit right at the edge of the bed.

6. Radishes

Radishes are one of the smartest interplanting choices for zucchini. They sprout and mature fast, so you can sow them right at the base of your plants and harvest them long before the zucchini fills out that space. They also help deter squash vine borer and cucumber beetles, so a quick crop of radishes does double duty early in the season.

7. Dill, oregano, and sunflowers

Flowering herbs like dill and oregano, along with sunflowers, bring in pollinators and the beneficial insects that keep pest numbers down. Let a few plants flower rather than cutting them all, and you create a steady draw for bees and predatory insects. Just site sunflowers where their height will not shade the zucchini, keeping them to the north edge.

What not to plant near zucchini

A few neighbors do more harm than good. These are the ones to keep out of the zucchini patch.

Potatoes

Potatoes are heavy feeders that compete hard with zucchini for water and nutrients, and both can be susceptible to overlapping soil-borne problems. Growing them side by side stresses your plants and raises disease pressure, so keep the two well separated in the garden.

Fennel

Fennel is famously a poor companion for almost everything. It is allelopathic, releasing compounds that can slow or inhibit the growth of most nearby vegetables, zucchini included. If you grow fennel, give it its own corner well away from the zucchini patch.

Other cucurbits (a nuanced note)

Cucumbers, melons, and squash are cousins of zucchini in the cucurbit family, and they can share the same pests and diseases, including squash bugs, cucumber beetles, and powdery mildew. You can grow them in the same garden, but do not crowd them together. Give each plant room, keep airflow open to limit powdery mildew, and scout for pests early so a problem in one crop does not sweep through all of them.

Why companion planting works for zucchini

Companion planting is not folklore alone. With zucchini, it lines up with a few very practical needs of the crop.

• Pollination. Zucchini has separate male and female flowers, and bees must carry pollen between them for fruit to form. Flowers like borage, nasturtiums, and marigolds pull in more bees, which means better fruit set and fewer small, shriveled, or aborted zucchini.
• Pest control. Trap crops like nasturtiums and radishes draw squash bugs, beetles, and vine borers away, marigolds help deter nematodes, and flowering herbs invite the beneficial insects that prey on aphids and beetles.
• Living mulch and ground cover. Low, trailing companions shade the soil, hold in moisture, and crowd out weeds around the base of your plants.
• Efficient use of space. Quick crops like radishes and low beans fill the gaps early in the season, before the zucchini plant spreads out and claims the ground.

How to lay out a zucchini companion garden

A little planning makes companion planting easy. Zucchini plants get big, so start with generous spacing and build the companions around them.

• Give the plants room. Space zucchini roughly 2 to 3 feet apart so the leaves have space and air can move through, which is your best defense against powdery mildew. Skip crowding them against other big cucurbits.
• Sow quick crops early. Tuck fast radishes and low beans right around young zucchini early in the season. You will harvest or turn them under before the plants need that space.
• Ring the edges with flowers. Plant marigolds, nasturtiums, and borage around the border of the patch to draw pollinators in and steer squash bugs and beetles away from the fruit.
• Keep tall plants to the north. Set corn and sunflowers along the north edge so they never cast shade over your sun-loving zucchini.

Get the neighbors right and your zucchini patch will be better pollinated, better protected, and more productive. For the full sowing and care routine, see our zucchini growing guide, and if you are planting tomatoes nearby, our tomato companion plants guide pairs perfectly with this one. When you are ready to plant, browse the full zucchini seeds collection. Below you will find the exact non-GMO, heirloom seeds we grow alongside our own zucchini.