Zucchini Companion Plants: What to Grow (and Avoid) Near Zucchini

Zucchini is one of the most rewarding summer vegetables to grow—fast-growing, highly productive, and easy for beginners. But if you want to grow healthier plants, prevent pests, and increase your harvest naturally, zucchini companion planting is the way to go.

This guide explores the best companion plants for zucchini, what not to plant nearby, and why these plant pairings work based on natural garden ecology.

Chapters

Zucchini Companion Plants [Video Tutorial]

What Is Companion Planting?

Companion planting is the practice of grouping plants together based on how they can support each other’s growth. The right plant partners can:

• Deter common pests
• Improve pollination
• Maximize space
• Enhance flavor or vigor
• Suppress weeds naturally

In the case of zucchini (also known as courgette), companion plants can help with pollination, reduce pests like squash bugs, and optimize space in small gardens.

Best Companion Plants for Zucchini

1. Nasturtiums

Pest Deterrent + Pollinator Magnet

Nasturtiums attract aphids, squash bugs, and flea beetles—keeping them away from your zucchini. Their bright flowers also attract bees and other pollinators.

Plant tip: Grow around the base of your zucchini or in nearby rows.

2. Radishes

Soil Loosening + Pest Protection

Radishes grow quickly and loosen the soil, helping zucchini roots breathe. They also deter squash vine borers when planted early.

Bonus: Harvest radishes while zucchini is still young.

3. Marigolds

Repels Root Nematodes + Aphids

Marigolds are classic companion plants that emit compounds toxic to harmful soil-dwelling pests. Their scent also helps confuse flying insects.

Plant tip: Use French marigolds, which are the most effective for pest control.

4. Beans

Nitrogen Boosters

Legumes like bush beans and pole beans fix nitrogen in the soil, which can benefit heavy-feeding plants like zucchini.

Spacing tip: Avoid crowding—plant beans on the opposite side of the row or use trellises.

5. Corn

Vertical Companion

Tall corn stalks provide light shade during the hottest part of the day and can support climbing plants that won’t compete with zucchini’s low-growing vines.

Pair with: Beans, for a mini three-sisters garden setup.

6. Borage

Pollinator Favorite + Improves Growth

Borage attracts bees and beneficial wasps while deterring tomato hornworms and cabbage worms. Anecdotally, it improves the health and flavor of nearby plants.

7. Herbs: Oregano, Dill, and Mint (in Containers)

Aromatic Barrier

These herbs repel pests like squash bugs and beetles with their strong scents. But they can become invasive—so plant them in pots near your zucchini beds.

Zucchini Companion Planting Chart

Here’s a quick-reference table you can use in your garden plan.

Plants to Avoid Near Zucchini

Some plants can attract the wrong pests or compete too aggressively with zucchini for space, light, or nutrients.

What Not to Plant Next to Zucchini:

• Potatoes – Compete for nutrients and may spread fungal diseases.
• Pumpkins – Too similar in growing habits; invite same pests.
• Cucumbers – Compete for light and space; risk of cross-pollination and pest buildup.
• Melons – Like cucumbers, they sprawl and can crowd zucchini.
• Fennel – Inhibits growth of most vegetables, including zucchini.

Tips for Successful Zucchini Companion Planting

• Use mulch to suppress weeds and regulate soil temperature.
• Water at the base of the plant to avoid mildew and fungal diseases.
• Hand-pollinate if bee activity is low (zucchini needs male and female flower interaction).
• Rotate crops each year to avoid pest buildup in the soil.
• Prune zucchini leaves to improve airflow and reduce powdery mildew risk.

Final Thoughts: Let Nature Work for You

Zucchini plants are generous producers, but they can be even more successful when grown alongside the right companions. Whether you’re using nasturtiums for pest control, beans for soil health, or borage for pollination, the key is balance.

With thoughtful companion planting, you’ll enjoy healthier zucchini plants, fewer pests, and bigger harvests—naturally.

FAQs: Zucchini Companion Planting

Can I plant tomatoes and zucchini together?

Not recommended. They’re both heavy feeders and can compete for nutrients. They also share similar pest threats like whiteflies and aphids.

What herbs grow well with zucchini?

Oregano, dill, mint (in containers), and basil are all helpful for pest deterrence and attracting pollinators.

Can zucchini grow next to cucumbers or melons?

It’s better to separate them. They compete for space, invite the same pests, and risk poor fruit development due to cross-pollination issues.

How far apart should I plant zucchini from other companions?

Give zucchini at least 18–24 inches of space between other plants to allow for airflow and leaf spread.

Can zucchini and squash grow together?

It’s not ideal. Zucchini and other squash (like butternut or acorn) are prone to the same pests and diseases, such as squash vine borers and powdery mildew. Growing them close together can increase infestation risk and reduce airflow.

Can I grow zucchini and peppers together?

Yes, but with caution. Peppers are smaller and won’t overshadow zucchini, but both are heavy feeders. Ensure the soil is nutrient-rich and space them far enough apart to avoid competition.

Do zucchini plants need pollinators?

Yes. Zucchini has separate male and female flowers, and bees are essential for fruit development. Companion plants like borage, nasturtiums, and marigolds help attract pollinators.

What is the best flower to plant with zucchini?

Nasturtiums are a top choice because they attract beneficial insects and act as a trap crop for aphids and squash bugs. Marigolds are also excellent for deterring root nematodes and whiteflies.

Can zucchini be planted with herbs?

Yes, but choose herbs wisely. Strong-scented herbs like oregano, dill, and mint (in containers) help deter pests. Avoid planting fennel, which can inhibit zucchini growth.

How can I prevent zucchini from getting powdery mildew?

Good airflow is key. Avoid overcrowding, prune lower leaves, water at the base, and plant with companions that don’t block sunlight or trap humidity, like radishes or beans.

What vegetables grow well next to zucchini?

Zucchini grows well with beans, corn, radishes, marigolds, and peas. These either fix nitrogen in the soil, attract pollinators, or help manage pests naturally.

Can I trellis zucchini to save space for companions?

Yes—for certain varieties. Some vining or climbing zucchini types can be trained on a trellis, freeing up space for low-growing companions like basil or radishes.

Should I rotate zucchini planting each year?

Yes. Zucchini is susceptible to soil-borne pests and diseases. Rotate with unrelated crops (like legumes or leafy greens) annually to avoid buildup of squash-specific pests.

How many zucchini plants should I grow?

One healthy plant can produce 6–10 zucchinis per season, sometimes more. Most home gardeners only need 1–2 plants unless you’re preserving or sharing.

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• Need To Know When Growing Fruits, Vegetables & Herbs

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