Marigolds are great for helping to keep whiteflies away from your tomatoes; and borage, which produces a lovely blue flower, has been known to repel tomato hornworms and cabbage worms. Introducing "One Thing": A New Video Series. Many flowers make attractive additions to a rose garden, and if they have the same light, moisture, and fertility requirements, they can be planted quite successfully near roses. According to floridata.com, crape myrtles are such effective trap plants for aphids that commercial nurseries plant them to lure insects away from nursery plants. These plants grow fast and like sunny, dry climates. Companion planting is growing certain types of plants together so that they help each other to grow better. Onions, garlic and their relatives repel aphids. This list of pest-repelling plants includes plants used for their ability to repel insects, nematodes, and other pests. Yarrow: attracts ladybugs, which will then eat any nearby aphids. 4. For example, dill and coriander can attract lady bugs. If you plan things right you can use plants to keep garden pests under control. They deter aphids and other pests by confusing them with their strong scent. Talk about a powerhouse pest repellent! By using The Spruce, you accept our, Best and Worst Companion Plants for Potatoes, Companion Planting to Control the Insects in Your Garden, Best and Worst Companion Plants for Tomatoes, Best Companion Plants for Cucumbers and Those to Avoid, Best and Worst Companion Plants for Garlic, The Best Companion Plants for Pole Beans and Bush Beans, Best Companion Plants for Broccoli and Those to Avoid, The Best and Worst Companion Plants for Zucchini and Summer Squash, Best and Worst Companion Plants for Cilantro, Best and Worst Companion Plants for Watermelon, The Best Companion Plants for Garden Peas (and Those to Avoid). Companion planting has been going on for many centuries and is pretty much where different species are planted together for mutual benefit. This could be one plant providing shade for another, a neighbouring plant boosting nutrients in the soil or in garlic’s case keeping pests away. Finally, avoid any plants that are known to be invasive or prone to uncontrollable spreading. Peppers and Basil. Basil. Basil is a great companion for tomatoes, peppers, beans, eggplant, and asparagus to name a few. Relying on credible research-based information cuts through a sea of unfounded horticultural claims and provides gardeners with valid solutions. Scientific studies confirm that plants with strong odors, such as onion and garlic, mask favorable plant scents, such as roses, and deter pests. 5. Strategic companion planting is especially important in small gardens or wherever careful space planning is needed. Marigolds: deter pests and help encourage strong plant growth. … Companion planting refers to the close planting of different species based on their ability to enhance one another's growth or offer some form of pest protection or other advantages. Flowers and vegetables don’t have to have separate spots in your garden. Roses are healthier when provided with companion plants which help repel destructive bugs while encouraging beneficial insects. MARIGOLDS (Calendula): The workhorse of pest deterrents. © Copyright 2020 Hearst Communications, Inc. Asparagus, basil, carrots, celery and parsley are ideal companion plants for tomatoes to help each other grow. Some companion plants may help discourage pests without the use of chemicals because there are natural substances in their leaves, flowers, or roots that repel insects. Both have strong scents that drive away each other’s pests. For example, some aromatic compounds may mask the scent of companion plants: the aroma of garlic will chase away bean beetles and potato bugs. Companion planting has a long tradition in organic gardening practice. Basilhelps repel flies and mosquitoes. Rue is another effective herb with such an offensive odor that it drives away aphids. Of these, nasturtiums and marigolds are my absolute favourite companion plants. Keeps the soil free of nematodes; discourages many insects. The best companion plants for roses are those that share the same care requirements (in terms of light, moisture, and fertility) and also help the roses grow better. By using strong scented herbs like oregano, parsley, chives, you can help deter pests from your crops. They deter aphids and other pests by confusing them with their strong scent. Companion plants either repel destructive insects by producing offensive phytochemicals or they attract beneficial insects that prey on pests. French marigolds (Tagetes patula) deter whitefly from visiting your greenhouse. Nicotiana will attract whitefly, keeping them off other plants. Save and grow some to get rid of this harmful insect from your garden now. Plant a few under tomatoes to keep them at bay. Companion Planting Herbs & Flowers creates a more beautiful and productive garden. Plant freely throughout the garden. Although aphids are the most common insect pest on roses, using toxic chemicals to control them is usually unnecessary, according to the University of California. https://www.gardenersworld.com/plants/10-companion-plants-to-grow Repelling insects by creating effective crop combinations uses plants’ natural fragrance, oils, compounds, and colors to chase pests away. The herbs below are the ones that work best with roses. Many herbs attract beneficial insects, which will keep rose pests in check. Cornell recommends planting marigolds (Tagetes spp., not Calendula spp.) Reaching for chemical bug killers is often a knee-jerk reaction to the sight of aphids feasting on prize roses. Plants that are university field-tested with proven results of being able to keep aphids away from roses include onions, garlic, some herbs and certain other flowers. 7. One aspect of companion planting that can be quite useful in the vegetable patch is partnering plants in hopes of repelling certain pests. They have culinary value and they also repel aphids. Colleen Vanderlinden is a freelance writer and the author of Edible Gardening for the Midwest. Much like alliums, certain herbs help roses deter pests (most notably, aphids). Chivesgrown beneath apple trees will help to prevent apple scab; beneath roses will keep away aphids and blackspot. Carawayhelps breakdown heavy soils. In fact, members of the onion family, such as chives, ornamental alliums, and edible onions, increase the perfume of roses, ward off aphids, and prevent black spot. #2 Garlic. Keep in mind that some companion plants can easily become overgrown, thus some maintenance to keep them under control will be required. Companion plants can also be used to attract good insects that prey on garden-eating pests. The practice of using flowers and plants to keep bugs away from other plants is called companion planting. Beneficial flowers in a vegetable garden include nasturtiums, marigolds, zinnias, petunias, sweet peas, cosmos, and sunflowers. Geraniums: repel Japanese beetles, aphids, and other rose beetles. An unlikely plant that acts as an aphid magnet is the crape myrtle tree. GARLIC: Plant near roses to repel aphids. All members of the onion family are useful companions for roses. 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