Tips & Techniques
Betterdays in Full Swing

Marry Your Flowers and Veggies: Companion Planting Guide to Your Garden


By Linda Ly

Gardeners know that a diverse mix of plants, from annuals and perennials to flowers and vegetables, makes for a healthier garden. But did you know that the right (or wrong) combination of certain plants could actually make them more (or less) productive?

The process is known as companion planting. It is believed that growing certain plants in close proximity to others may help deter pests, promote growth and even improve flavor—or on the opposite end of the spectrum, certain plants, when planted close to one another, may actually stunt each other’s growth.

Learn which flowers and veggies work well together, and which ones should be planted far from one another.

  • What are Companion Plants?
  • Benefits of Companion Planting
  • Popular Companion Plants for Vegetables
  • Companion Planting Chart
  • Tips for Watering Companion Plants
  • What are Companion Plants?

    Companion plants are plants that complement one another in terms of growth and production. For example, one plant may attract an insect that might protect a companion plant. Another plant may act as a repellent for a bug that might be harmful to the plant next to it.

    It is also important to look at the nutrients individual plants need. A companion plant may need less of one specific nutrient while its neighbor desperately needs it to thrive. In this case, companion planting would eliminate the competition between the two plants.

    Benefits of Companion Planting

    There are many benefits to companion planting. Most gardeners would agree, the more help you can get to achieve a productive, fruitful garden, the better! What and how can companion planting help?

    Companion Planting Chart

    Type of Vegetable Friends Enemies Special Notes
    Basil, carrots, coriander, dill, marigolds, parsley, tomatoes Garlic, onions, potatoes Marigolds, parsley and tomatoes protect against asparagus beetles.
    Asparagus, beans, beets, bell peppers, cabbage, chili peppers, eggplant, marigolds, oregano, potatoes, tomatoes Rue When basil is grown about 1 foot from tomato plants, it will increase the tomatoes yield. It also improves the flavor of lettuce.
    Beets, carrots, chard, cabbage, corn, cucumbers, peas, radishes Garlic, onions Nasturtiums and rosemary deter bean beetles
    Broccoli, Brussels sprouts, bush beans, cabbage, cauliflower, chard, kohlrabi, onions Charlock, field mustard, pole beans Pole beans and beets will compete for growth. Composted beet leaves add magnesium to soil when mixed. Magnesium plays an important role in photosynthesis.
    Basil, beets, bush beans, carrots, celery, chamomile, cucumber, dill, garlic, lettuce, marigolds, mint, nasturtiums, onions, radishes, rosemary, sage, spinach, Swiss chard, thyme Asparagus, cantaloupe, climbing beans, mustard, peppers, pumpkins, strawberries, sweet corn, watermelon Rosemary repels the cabbage fly that is detrimental to broccoli.
    Beets, celery, chard, lettuce, spinach, onions Kohlrabi, tomatoes Hyssop, mint, and sage deter cabbage moths
    Beans, lettuce, onions, peas, peppers, tomatoes Dill Chives improve flavor, rosemary deters carrot flies
    Climbing beans, cucumber, marjoram, peas, pumpkins, squash, sunflowers, zucchini Tomatoes Tomato worms and corn earworms like both plants. Beans and peas supply nitrogen.
    Cabbage, carrots, chard, lettuce, peppers, tomatoes Beans, peas Chamomile improves growth and flavor
    Basil, beans, celery, corn, garlic, horseradish, lettuce, marigolds, onions, peas, radishes, spinach Asparagus, broccoli, Brussels sprouts, cabbage, cauliflower, carrots, cucumbers, eggplant, kohlrabi, melons, peppers, raspberries, squash, sunflowers, strawberries, tomatoes Cucumbers, tomatoes and raspberries attract harmful pests to potatoes. Horseradish increases disease resistance.
    Beans, corn, marigolds, nasturtiums, squash Potatoes NONE
    Beets, cabbage, carrots, chives, cucumbers, kale, lettuce, spinach, squash Hyssops Radish plants will work as a trap crop to protect against certain beetles.
    Beans, corn, dill, marigolds, nasturtiums, peas, radishes, strawberries, sunflowers Potatoes Squash has similar traits to pumpkin in terms of companion plants.
    Bush beans, caraway, chives, lettuce, onions, sage, spinach, squash Cabbage family, eggplants, peppers, potatoes, tomatoes NONE
    Asparagus, carrots, celery, onions, parsley, peppers Corn, dill, kohlrabi, potatoes Basil, mint, and bee balm improve growth and flavor
    Beans, corn, dill, garlic, marigolds, nasturtiums, oregano, peas, radishes, spinach Potatoes and pumpkin NONE


    Tips for Watering Companion Plants

    When growing different varieties of plants side by side, try to group them together by water needs. Deep-rooted vegetables like tomatoes and asparagus should be placed in the same bed, as they will thrive with less frequent (but more thorough) watering that soaks deep into the soil.

    On the flip side, shallow- to medium-rooted plants like beans and chard benefit from more frequent watering that saturates just the first few inches of soil. Wind soaker hoses around your plants and attach them to dual outlet electronic timers to easily manage your watering schedule for different beds.

    Companion planting is a great way to ensure you have a garden that will grow healthy plants and produce large bounties. A lot of work goes into maintaining a productive garden, so it is worth the time, effort and research it takes to grow like-minded plants that will help each other out. And with Gilmour’s guide to companion planting, we take some of the guesswork out of the process for you!

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