Your garden-grown salads just got a whole lot tastier.
Cucumbers are a warm-weather favorite in vegetable gardens, prized for their crisp texture and refreshing taste. Whether you grow them on trellises or let the vines sprawl across the ground, they can certainly benefit from having good cucumber companion plants nearby.
Companion planting is the practice of growing certain plants together to improve growth, deter pests, or boost flavor. Jessica Mercer of Plant Addicts explains that benefits may come from physical traits, biochemical effects, or decoy tactics that draw pests away. “Tall plants provide shade, deep roots loosen soil, legumes fix nitrogen, and marigolds suppress nematodes,” she says of the myriad benefits that certain plants provide.
When it comes to cucumbers, several flowers, herbs, and vegetables make excellent companions—while others are their "nemeses" and should be best kept at a distance. For instance, you should avoid planting cucumbers near potatoes, which can compete for nutrients and are susceptible to similar diseases. Also, sage may stunt cucumber growth, and melons and squash can attract similar pests and can spread disease quickly between one another.
Here are 10 of the best plants to grow alongside your cucumbers, whether you’re looking to boost pollination, ward off pests, or simply make the most of your space while helping your cucumbers thrive.
Radishes act as a natural pest repellent, especially against cucumber beetles. They grow quickly and can be harvested before cucumber vines take over, making them a low-maintenance, high-reward companion. Plus, their tap roots break up compacted soil, according to Mercer.
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These cheerful flowers attract pollinators and beneficial insects while luring aphids and cucumber beetles away from your crop. They also help keep the soil moist and shaded beneath sprawling cucumber vines.
Marigolds release a scent that deters many common garden pests, including nematodes and aphids, according to Mercer. Their bright flowers also attract pollinators, helping cucumbers set fruit more efficiently.
Dill attracts beneficial insects like ladybugs and lacewings that feast on soft-bodied pests. It also adds a flavorful touch to your summer pickling projects.
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Bush beans and pole beans fix nitrogen in the soil, which benefits heavy feeders like cucumbers. Just be sure to provide enough space so neither plant gets crowded or overwhelmed by the other’s vines.
These towering plants can serve as a natural trellis for cucumbers to climb. They also attract pollinators and provide a bit of afternoon shade, which can prevent cucumber plants from overheating in hot climates.
Lettuce grows quickly and tolerates partial shade, making it a great groundcover beneath cucumbers. It helps keep the soil cool and moist and can be harvested before cucumbers reach full size.
Celery helps repel pests such as whiteflies and is known to improve the flavor of nearby crops. Its slow growth pairs well with cucumber vines that take longer to mature.
Like lettuce, carrots are compact and won’t compete much with cucumbers for space. They grow deep in the soil while cucumbers stay mostly at the surface, making them ideal underground companions. “Blending root systems can improve soil structure and fertility, because tap-rooted crops like carrots break up compact soil,” says Mercer.
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This herb attracts bees and other pollinators to your garden while improving the health and growth of nearby cucumber plants. Borage is also believed to deter pests like tomato hornworms and cabbage worms.
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