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13 Watermelon Companion Vegetation—Plus 6 to Keep away from



Summer season’s candy, juicy watermelons are straightforward to develop in your individual yard—with the correct circumstances. You’ll want heat temperatures, full solar, constant watering, well-draining soil, and loads of room to unfold out. For optimum success, you’ll additionally wish to add companion vegetation that present mutual advantages.

Watermelon companion vegetation embody flowers, herbs, and greens that may profit your melons. They assist repel unhealthy bugs and appeal to helpful ones, improve soil well being, suppress weeds, present shade and shelter from wind, and deter frequent ailments. They will additionally present bodily assist, like a pure trellis, to maintain fruit off the bottom to scale back the chance of rot and pest injury. Companion vegetation may even enhance your watermelon’s taste!

We requested gardening consultants to share the most effective watermelon companion vegetation that may yield happier, more healthy, greater fruit—in addition to which vegetation you must keep away from rising close by.

Marigold

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Marigolds (Tagetes spp.) are fast-growing annuals with vibrant daisy-like blooms that act as pest management. “Marigolds naturally deter pests like aphids, nematodes and whiteflies, which might hurt watermelon vegetation,” says Carrie Spoonemore, co-creator of Park Seed’s From Seed to Spoon app, an app that makes backyard planning simpler.

  •  Zone: 2 to 11 (varies by species)
  •  Mature measurement: 6 inches to three ft tall
  •  Care necessities: Full solar; well-draining soil; common watering

Corn

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Tall, fast-growing stalks of corn (Zea mays) act as a pure trellis for climbing watermelon vines and supply shade and wind safety, says Tony O’Neill, gardening skilled at Simplifygardening.com and creator of a number of gardening books together with the bestseller, Simplify Vegetable Gardening. “By rising corn alongside watermelons, you create a microclimate that reduces warmth stress on the watermelon vegetation and minimizes wind injury to the vines,” he says.

  • Zone: 4 to 10
  • Mature measurement: 4 to 12 ft tall
  • Care necessities: Full solar; well-draining soil; common watering

Nasturtium

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Nasturtium (Tropaeolum majus) is an annual trailing or climbing plant with colourful, edible flowers that repel dangerous aphids, squash bugs, and whiteflies. Nasturtium additionally attracts helpful bugs similar to beetles. “Planting nasturtiums close to watermelons can create a pure pest barrier, decreasing the necessity for chemical interventions,” O’Neill says.

  •  Zone: 9 to 11 (grown as annuals elsewhere)
  •  Mature measurement: 12 to 18 inches tall and broad
  •  Care necessities: Full solar to partial shade; well-draining soil; average watering

Borage

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Borage (Borago officinalis) is a hardy annual herb with blue star-shaped flowers and coarse, bushy leaves. “It attracts pollinators like bees, that are important for watermelon fruit set,” says Spoonemore, referring to the transition from flower to fruit that requires fertilization. Borage additionally enriches the soil by including hint minerals and might repel tomato hornworms.

  • Zone: 2 to 11
  • Mature measurement: 18 to 36 inches tall
  • Care necessities: Full solar; well-draining soil; average watering

Garlic

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Garlic (Allium sativum) is a hardy, bulbous perennial with pungent-smelling cloves that individuals love however bugs hate. Garlic additionally has pure antifungal properties that assist stop ailments similar to powdery mildew, based on Spoonemore. Plant garlic between watermelon rows with somewhat house in between in order that they don’t compete for water and vitamins.

  • Zone: 3 to eight
  • Mature measurement: 12 to 18 inches
  • Care necessities: Full solar; well-draining soil; average watering

Radish

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Radishes (Raphanus sativus) are fast-growing root greens with a spicy tang that deters aphids and cucumber beetles, that are frequent pests for watermelons, based on Spoonemore. They will additionally assist break up compacted soil. As a bonus, radishes must be prepared to reap earlier than your watermelons want the house.

  • Zone: 2 to 11
  • Mature measurement: 6 to 18 inches tall
  • Care necessities: Full solar; well-draining soil; constant watering

Mint

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Zesty mint makes an incredible breath freshener—and an incredible repellent for aphids and ants. “Mint’s robust aroma confuses pests, making it tougher for them to find the watermelon vegetation,” O’Neill says. However be forewarned: This fast-growing herb can change into invasive, so plant it in containers or raised beds so the roots gained’t mingle and compete.

  • Zone: 3 to 11 
  • Mature measurement: 12 to 18 inches tall
  • Care necessities: Full solar to partial shade; well-draining soil

Beans

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Beans (Phaseolus vulgaris) are legumes identified for “nitrogen fixing,” that means they pull nitrogen from the air and retailer it of their roots, then deposit it within the soil once they decompose. “Nitrogen enriches the soil, benefiting watermelons, that are heavy feeders,” Spoonemore says. In addition they kind a floor cowl that retains the soil moist.

  • Zone: 3 to 10
  • Mature measurement: 1 to 10 ft tall (relying on selection)
  • Care necessities: Full solar; well-draining soil; common watering

Basil

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Basil (Ocimum basilicum) is an annual herb with strongly fragrant leaves that repel aphids, thrips, mosquitoes, flies, and extra. “Basil’s scent confuses pests,” O’Neill says. And as a bonus, he provides, “Its flowers appeal to pollinators, making it a dual-purpose companion plant.” For max pest management, plant basil between watermelon rows or on the perimeter of the patch. 

  • Zone: 2 to 11
  • Mature measurement: 18 to 24 inches tall x 12 to 24 inches broad
  • Care necessities: Full solar; well-draining soil

Dill

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One other fast-growing plant that makes an incredible watermelon companion is dill (Anethum graveolens). This annual herb, with feathery leaves and yellow flowers, attracts helpful bugs similar to ladybugs and parasitic wasps that assist management pest populations, Spoonemore says.

  • Zone: 2 to 11
  • Mature measurement: 18 to 24 inches tall
  • Care necessities: Full solar; well-draining soil; common watering

Oregano

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Oregano (Origanum vulgare) is a perennial herb with fragrant leaves that repel pests similar to aphids and spider mites. “Its dense foliage also can present shade and moisture retention for close by vegetation,” Spoonemore says. 

  • Zone: 4 to 9
  • Mature size: 6 to 24 inches tall
  • Care necessities: Full solar; well-draining soil; weekly watering

Sunflowers

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Sunflowers (Helianthus annuus), the tall annuals with cheerful vivid blooms, deliver a number of items to your rising watermelon vines. In response to O’Neill, their flowers appeal to pollinators, their deep roots assist to interrupt up compacted soil, bettering soil construction, and their sturdy stems act as a pure trellis for pole beans and peas, do you have to be planting these close by. 

  • Zone: 2 to 11
  • Mature measurement: 5 to 12 ft tall x 2 to three ft broad
  • Care necessities: Full solar; well-draining soil

Clover

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Clover (Trifolium spp.) is a low-growing perennial floor cowl that may improve the soil in your watermelon patch. “Clover fixes nitrogen within the soil, bettering fertility,” Spoonemore explains. “It additionally reduces weeds and retains soil moisture.”

  • Zone: 3 to 10
  • Mature measurement: 6 to 12 inches tall
  • Care necessities: Full solar to partial shade; well-draining soil; average watering

What To not Plant Close to Watermelon

Simply as some vegetation can profit watermelon development, different vegetation can damage it—by competing for sources, together with water, mild, and vitamins, and by attracting pests that injury each crops. Listed here are some vegetation you must keep away from rising subsequent to your watermelons.

  • Potatoes 
  • Cucumbers 
  • Squash 
  • Cantaloupe 
  • Honeydew melon
  • Eucalyptus



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