This post contains affiliate links. As an Amazon Associate I earn from qualifying purchases. If you click a link and make a purchase, I may receive a small commission at no extra cost to you.
What to plant with summer squash is a question worth answering because the right companions can boost your harvest and keep pests away.
When you figure out what to plant with summer squash, you’re essentially building a little ecosystem where every plant helps the other.
Summer squash is a heavy feeder and a magnet for pests, so companion planting is less about tradition and more about strategy.
In this post, we’ll look at what to plant with summer squash, what to keep far away from it, and how to arrange everything so your garden thrives.
Let’s dig in.
Why Companion Planting Matters for Summer Squash
Knowing what to plant with summer squash starts with understanding what summer squash needs.
Summer squash grows fast and produces heavily, which means it pulls a lot of nutrients from the soil.
It also attracts squash bugs, vine borers, and aphids like nobody’s business.
That’s why what to plant with summer squash is really a question of pest control and soil health rolled into one.
The plants you choose can repel insects, attract pollinators, or act as a living mulch.
Get it right, and you’ll spend less time fighting problems and more time harvesting.
1. It Repels Pests Naturally
Certain flowers and herbs release scents that confuse or drive away common squash pests.
When you plant these next to your summer squash, you create a protective barrier without chemicals.
2. It Improves Pollination
Summer squash needs bees to set fruit, and flowers like borage and nasturtium bring them in droves.
More pollinators mean more zucchini, pattypans, and yellow crookneck squash.
3. It Maximizes Garden Space
Summer squash sprawls, but the right companions grow vertically or fill gaps without competing.
That’s the beauty of knowing what to plant with summer squash.
The Best Plants to Grow With Summer Squash
Now for the good stuff.
Here are the best answers to what to plant with summer squash.
1. Nasturtiums
Nasturtiums are a top pick when deciding what to plant with summer squash.
They act as a trap crop, luring aphids and squash bugs away from your main harvest.
Their bright flowers also attract pollinators.
2. Borage
Borage is another star companion for summer squash.
It deters squash bugs and vine borers while drawing in bees.
Plant borage near your summer squash and let it self-seed year after year.
3. Marigolds
Marigolds are a classic when figuring out what to plant with summer squash.
Their roots release compounds that suppress nematodes in the soil.
Plus, they’re cheap, cheerful, and easy to grow.
4. Radishes
Radishes make a smart companion for summer squash because they mature fast.
Sow them around your squash and harvest them before the vines take over.
They also help loosen the soil.
5. Beans and Peas
Beans and peas fix nitrogen in the soil, which summer squash loves.
Just be careful with pole beans, as they can shade your squash if you’re not paying attention.
6. Corn
Corn and summer squash are old companions in traditional three sisters gardens.
Corn provides a windbreak, and squash shades the soil to keep moisture in.
7. Herbs Like Dill and Oregano
Dill and oregano are great when thinking about what to plant with summer squash.
They attract beneficial insects that prey on squash pests.
Let dill flower for maximum benefit.
What NOT to Plant With Summer Squash
Just as important as what to plant with summer squash is what to avoid.
1. Other Squash Varieties
Avoid planting other squash or pumpkins nearby.
They cross-pollinate, and you can end up with weird, bitter fruit.
2. Potatoes
Potatoes compete for the same nutrients and can attract similar pests.
Keep them apart when planning what to plant with summer squash.
3. Fennel
Fennel releases chemicals that stunt the growth of many garden plants, including summer squash.
Give it its own corner.
Tips for Arranging Your Summer Squash Garden
Once you know what to plant with summer squash, placement matters.
Give summer squash plenty of room, at least three feet between plants.
Tuck taller companions like corn or pole beans on the north side so they don’t shade the squash.
Scatter flowers like nasturtiums and marigolds throughout rather than in one block.
And remember, what to plant with summer squash isn’t just about the plants themselves.
Healthy soil, consistent watering, and mulching matter just as much.
So, What to Plant With Summer Squash?
What to plant with summer squash comes down to pairing it with pest-repelling flowers, nitrogen-fixing legumes, and pollinator magnets.
Nasturtiums, borage, marigolds, radishes, beans, corn, and herbs like dill all make excellent neighbors.
Avoid other squash varieties, potatoes, and fennel.
Get the pairing right, and your summer squash will reward you with a bumper crop all season long.