Hey garden friends! A big thanks to our reader Mark, who wrote in saying, “I love growing veggies, but so do the bugs. How do I stop them from turning my plants into a buffet—without using chemicals?” Great question, Mark!

Today, we’re talking about organic pest control—specifically, using plants to distract, deter, and outsmart hungry insects. But before we dive in, let’s set the record straight: insects aren’t the enemy. Every bug in your garden has a role to play, even the ones munching on your veggies.

The key is balance—keeping populations in check so no single species overwhelms your plants.

Why Bugs Are Important in Your Garden

It’s easy to label insects as “good” or “bad,” but the truth is, they’re all part of a functioning ecosystem. Some help pollinate your plants, some break down organic matter to enrich the soil, and yes, even the ones that nibble on your leaves serve as food for beneficial predators like birds, frogs, and ladybugs. Rather than wiping them out completely, our goal is to create a system where everything coexists—your veggies included.

Plants That Repel Pests

Some plants naturally produce scents or compounds that bugs just can’t stand. By incorporating
these into your garden, you can help keep insect populations balanced without disrupting the
ecosystem.

• Marigolds – These cheerful flowers don’t just brighten up your garden; they also repel insects like nematodes, aphids, and whiteflies.
• Basil – Keeps mosquitoes and flies away while doubling as a delicious herb for your kitchen.
• Lavender – A great choice for deterring moths, fleas, and mosquitoes while attracting pollinators.
• Rosemary – Repels cabbage moths, bean beetles, and carrot flies.
• Mint – Ants, aphids, and even rodents dislike the strong scent. Just plant it in a container because mint will spread everywhere.

Trap Crops: Sharing the Feast

Instead of trying to eliminate pests completely, why not give them their own buffet? Some plants
act as decoys, attracting insects away from your prized crops and keeping their populations from
spiraling out of control.

• Nasturtiums – Aphids love these flowers, so plant them near veggies like tomatoes and peppers to keep the pests distracted.
• Radishes – Flea beetles flock to radish leaves, leaving your eggplants and cabbages (orbrassicas) alone.
• Mustard Greens – A favorite snack for aphids and caterpillars, drawing them away from other plants.
• Blue Hubbard Squash – This variety attracts squash bugs and cucumber beetles, sparing your zucchinis and cucumbers.

Companion Planting: The Ultimate Garden Strategy

By planting certain combinations together, you can confuse pests, enhance plant growth, and
even improve flavor. Here are some winning combos:

• Tomatoes + Basil – Basil repels whiteflies and hornworms while enhancing the flavor of tomatoes.
• Carrots + Onions – Onions deter carrot flies, while carrots keep onion flies at bay. A perfect pair!
• Cabbage + Dill – Dill attracts beneficial insects that feast on cabbage-eating worms. (My favorite thing about dill is that it is awesome at attracting butterflies and if you’re lucky, you can watch Black Swallowtail caterpillars chowing down on your dill!
• Beans + Marigolds – Marigolds keep away nematodes and aphids that love munching on bean plants.

Encouraging Nature to Keep Pests in Check

Instead of waging war on pests, invite their natural predators (stocked at Primex) to do the work
for you:

• Ladybugs & Lacewings – These tiny warriors love to feast on aphids, whiteflies, and other soft-bodied pests.
• Praying Mantises – A balanced predator that eats a variety of insects, both good and bad.
• Birds & Bats – Install birdhouses and bat boxes to encourage these flying pest-controllers to stick around.
• Beneficial Wasps – These tiny, non-stinging wasps help control caterpillars and other leaf-munching larvae.

Other Organic Pest Control Tips

• Use Row Covers – Lightweight fabric barriers keep pests from reaching your plants while still allowing sunlight and water through.
• Handpick Pests – It may not be glamorous, but manually removing larger pests like caterpillars or beetles can be an effective way to control populations.
• DIY Sprays – A mix of water, a drop of dish soap, and a dash of neem oil can work wonders against aphids and mites.

Final Thoughts

Instead of trying to eliminate insects from your garden, think of them as part of the system. By
using strategic planting and natural predators, you can keep populations balanced while maintaining a thriving, chemical-free garden.

Got a pest control trick that works wonders? Send it my way at
dearmediocregardener@gmail.com. Mark, I hope that you’re all set for this growing season!

For more of The Mediocre Gardener’s column with Glenside Local, you can click here. For more on Primex Garden Center of Glenside, you can visit their website and Facebook page.

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Photos: Edel Howlin