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What to plant with summer squash involves choosing companion plants that support its growth, repel pests, and make the most of your garden space.
Summer squash is a rewarding crop, but it has a few quirks.
It attracts pests, takes up room, and can hog nutrients if you’re not careful.
The good news is that the right companions can help with all of that.
In this post, we’ll look at what to plant with summer squash, why those pairings work, and which plants you should keep far away.
Let’s dig in.
Why Companion Planting With Summer Squash Works
Companion planting with summer squash works because certain plants naturally deter pests, improve soil, and attract pollinators.
When you plant with summer squash strategically, you create a mini-ecosystem that benefits everything in the bed.
1. Natural Pest Confusion
Strong-smelling plants like nasturtiums and marigolds mask the scent of summer squash.
This confuses pests like squash bugs and vine borers that hunt by smell.
2. Pollinator Attraction
Flowering herbs and blooms bring in bees and other pollinators.
Since summer squash needs pollination to set fruit, this is a huge win.
3. Living Mulch and Shade
Low-growing companions act as living mulch.
They keep the soil cool and moist, which summer squash loves.
Best Plants to Plant With Summer Squash
The best plants to plant with summer squash are ones that repel pests, attract pollinators, or improve the soil without competing too hard.
Here are the top choices.
1. Nasturtiums
Nasturtiums are one of the best things to plant with summer squash.
They act as a trap crop for aphids and squash bugs.
Pests munch on the nasturtiums instead of your squash.
Plus, their bright flowers attract pollinators.
2. Marigolds
Marigolds release a compound that repels nematodes in the soil.
They also deter whiteflies and other common garden pests.
Plant them around the border of your summer squash patch for protection.
3. Radishes
Radishes are a quick-growing companion for summer squash.
They loosen the soil as they grow, which helps squash roots spread.
You can harvest radishes long before the squash needs the space.
4. Beans and Peas
Beans and peas fix nitrogen in the soil.
Summer squash is a heavy feeder, so this natural fertilizer is a big help.
Just make sure the vines don’t completely smother the squash.
5. Borage
Borage is a powerhouse companion for summer squash.
It repels pests and attracts bees in droves.
The fuzzy leaves also confuse squash bugs looking for a meal.
6. Herbs Like Dill and Oregano
Herbs are great to plant with summer squash.
Dill attracts beneficial insects that prey on squash pests.
Oregano and other strong herbs confuse pests with their scent.
What NOT to Plant With Summer Squash
Not everything plays nice with summer squash.
Some plants compete for nutrients or attract the same pests.
Here’s what to avoid planting with summer squash.
1. Other Squash and Cucumbers
Planting summer squash with other squash varieties or cucumbers is a bad idea.
They compete for the same nutrients and space.
Worse, they attract the same pests, creating a bug buffet.
2. Potatoes
Potatoes and summer squash both need lots of water and nutrients.
Planting them together creates competition that hurts both crops.
3. Fennel
Fennel releases a chemical that can stunt the growth of nearby plants.
It’s best to keep fennel far away from summer squash.
Tips for Planting With Summer Squash
Now that you know what to plant with summer squash, here are a few tips to make it work.
1. Give Squash Room to Breathe
Summer squash needs good airflow to avoid powdery mildew.
Don’t crowd it with companions that grow too tall or too thick.
2. Use Vertical Space
Plant climbing companions like beans on trellises.
This saves ground space for the squash to spread.
3. Water Deeply and Consistently
Companions share the same soil, so everyone needs steady moisture.
Water at the base to keep leaves dry and prevent disease.
4. Rotate Your Crops
Don’t plant summer squash in the same spot year after year.
Rotating crops with your companions helps break pest cycles.
So, What to Plant With Summer Squash?
What to plant with summer squash comes down to picking companions that repel pests, attract pollinators, and feed the soil.
Nasturtiums, marigolds, radishes, beans, borage, and herbs like dill and oregano are all excellent choices.
Avoid other squash, cucumbers, potatoes, and fennel.
With the right pairings, your summer squash will thrive and your garden will be healthier overall.