Companion Plants For Cosmos – Learn About Cosmos Companion Plants
By: Mary H. Dyer, Credentialed Garden Writer
What grows well with cosmos, and why do cosmos need companions? Companion planting serves a number of valuable purposes in the garden. For example, the buddy system, most often used for veggies, makes good use of space, reduces pests and weeds, and allows neighboring plants to share nutrients. Companion planting may also reduce erosion and provide protection from cold and heat. However, companion planting is also beneficial for cosmos and other ornamentals. So, just what are good companion plants for cosmos?
Companion Planting with Cosmos
Cosmos don’t attract many pests – except aphids. Sometimes cosmos are put to work in the garden by drawing aphids away from other plants, a method known as decoy planting. For example, plant cosmos away from your prized roses. The cosmos plants take the brunt of the aphid attack while the roses benefit. Negate the damage to the poor, sacrificed cosmos with a regular dose of insecticidal soap spray or neem oil.
There are a number of plants that work well with cosmos and vice versa. Here are the most common cosmos companion plants.
- Tomatoes – Cosmos and tomatoes get along like old friends. Cosmos attract bees and other friendly pollinators, which often pay a visit to tomatoes while they’re in the neighborhood. As a result, tomato fruit set is increased. For the same reason, cosmos are a beneficial neighbor to squash and many other blooming vegetables.
- Beets – Beets actually do fine without cosmos, so what’s the reasoning behind this combination? It’s mainly aesthetic, as the dark red beet leaves are striking against the colorful blooms and lacy foliage of the cosmos plant.
Cosmos flower companion plants
- Cannas – This tall, sturdy, stately plant bears unique blooms in colors ranging from yellow to pink and red, all on tall, stiff stalks. Dwarf varieties of canna are also available.
- Marigolds (Tagetes) – Marigolds are familiar, hardworking annuals valued for their orange, yellow or rusty red blooms borne on single, sturdy stems.
- Crocosmia – Also known as Monbretia, crocosmia is an interesting plant with bright orange or red funnel-shaped blooms rising above clumps of sword-shaped leaves.
- Helenium – Also known as sneezeweed or Helen’s flower, this is a reliable plant that blooms profusely from midsummer to autumn. Helenium comes in shades of rich gold, burnt orange, yellow, mahogany, burgundy and rust.
- Dianthus – Also known as Indian pink or China pink, dianthus are neat, shrubby plants blooming in shades of white, pink and red with pink edges.
- Poppy – Poppies, a group of colorful plants that include annuals, tender perennials and biennials, are beloved for their cup-shaped blooms in intense shades of every color except blue.
- Verbena – The rugged verbena plant produces dark green foliage and clusters of small, flat blooms in a variety of bright colors.
- Cleome – Also known as spider flower, cleome is a fast-growing annual with masses of spiky blooms from early summer until the first frost. Cleome is available in shades of white and pink, as well as a unique shade of purple.
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9 Best Flowers for the Vegetable Garden
Introducing flowers to a vegetable garden is full of perks beyond simply adding beauty. Flowers can be used in companion planting to help deter pests and attract beneficial insects, such as pollinators. Interplanting also saves space and time, as you can grow and tend to more of your plants in one place.
Even without companion benefits, the vegetable garden is a lovely place to plant flowers intended for cutting. You can snip them as you're selecting vegetables for dinner. Here are nine of the best flowers to add a new dimension to your vegetable garden.
About Companion Planting
A companion plant supports other plants in your garden, creating balance. A balanced garden is organized and healthier with companion planting. There are many flowers, herbs, fruits and vegetables that thrive when grown in the same space. While the soil, climate and gardening practices all determine a garden's success, companion plants generally thrive when planted together. These plants keep away unwanted pests and attract beneficial insects that stimulate growth. In some cases, companion plants reduce the need for insecticides. Gardens that use companion plantings have healthier growth and larger crops.
Not just a defensive strategy, companion planting can also be a way to stay on the offensive. Bok choy may experience improved growth and health if you plant it near one or more of the following vegetables or herbs: beets, bush beans, carrots, chamomile, chard, cucumbers, dill, kale, lettuce, mint, nasturtiums, potatoes, sage and spinach. Growing chamomile, garlic or mint along side may even improve the flavor of your bok choy.
If you want to plant a lot of bok choy, consider planting it interspersed with other vegetables -- or incorporate it into your landscape. A bit of bok choy scattered here and there is less likely to attract insets or worms than a large plot of this leafy green vegetable. Additionally, companion plants don’t need to be right next to each other in order to derive the benefits. For pest control, for example, companion plants can be planted on the opposite side of the garden or even in a different raised bed than the bok choy.
Ann Wolters has been a writer, consultant and writing coach since 2008. Her work has appeared in "The Saint Paul Almanac" and in magazines such as "Inventing Tomorrow" and "Frontiers." She earned a Master of Arts in English as a second language from the University of Minnesota.
What grows well with celery?
QUESTION: I’m wanting to plant celery in my garden this year. What grows well with celery? -Kathy W
ANSWER: When you plan the layout of your garden to take advantage of the benefits of companion planting, your plants are grouped together purposefully. You may place plants close together because one repels the insects that plague its neighbor or because a tall neighbor gives shade to more delicate plants growing underneath its leaves. Some plants improve the taste of certain others when they grow close together. Often, plants are recommended as companions because they don’t vie for resources, whether they have different needs or take their nutrition from different soil depths. Here’s a list of plants commonly used as companions for celery in the garden.
Vegetables as Companion Plants
Certain vegetables grow better when planted close to others. They may provide needed shade, improve the soil by adding nutrients, attract beneficial insects, repel harmful garden pests or improve the flavour of the other plant. A good example of this is the Three Sisters Garden,
In a Three Sisters Garden, corn, beans and squash are planted together to maximize the yield on each crop. Each of these plants is beneficial to the other plants in some way. The corn provides support to the bean stalks as they grow. Beans improve the soil by adding nitrogen to it, which benefits both the squash and the corn, which is a particularly heavy feeder. The squash helps keep the weeds down, and benefits from the shade provided by the other two plants.
Watch the video below for more information on companion planting in an organic garden, including an example of a Three Sisters Garden.
Companion Plants for Pest Control
BY Kevin Lee Jacobs | April 8, 2010 39 Comments
“COMPANION PLANTING” — the theory that certain plants benefit each other when grown in close proximity — has proven an effective means of pest-control here at A Garden for the House. Last summer, rabbits immediately stopped munching my cosmos and zinnias after I edged the plants with fragrant lavender. And onions, when planted around the vegetable beds, have surely repelled moles, voles and certain insects, too. Now, what other plants are thought to aid each other in the garden?
Allium (onions, chives, garlic, shallots). Plant near roses, fruit trees, carrots, lettuce, tomatoes, broccoli, and other vegetables. Deters aphids, weevils, moles, fruit-tree borers. Protects roses from mildew, black spot and aphids.
Basil . Plant near tomatoes or asparagus. Repels aphids, flies, mosquitoes and spider mites controls the tomato hornworm and asparagus beetle.
Beans . Plant near beets, carrots, cucumber, corn, eggplant, potatoes. Encourages growth by adding nitrogen to soil is reported to control the Colorado potato beetle.
Borage . Plant around tomatoes, strawberries, fruit trees. Repels the tomato hornworm attracts honeybees.
Castor Bean . Plant near vegetables to thwart moles. Do not, however, mistake the castor bean as edible all parts of the plant are poisonous.
Celery . Plant near broccoli, cabbage, leeks, tomatoes, cauliflower. Deters the white cabbage-moth.
Coriander . Benefits all vegetables by repelling aphids.
Cosmos. Plant between rows of corn. Thwarts the corn worm (see comment #25 below).
Cucumber . Grown up cornstalks, the prickly vines of the cucumber discourage woodchucks and raccoons.
Fennel. Plant near tomatoes. In reader Karin’s experience (see comment #25 below), tomato hornworms devour the fennel, and and leave the tomatoes alone.
Geranium . Plant near cabbage, corn, grapes, roses. Repels cabbage worms may thwart Japanese beetles.
Horseradish . Grow near potatoes, to discourage Colorado potato beetle.
Hyssop . Locate near cabbage and grapes deters the cabbage moth.
Lavender . This is my favorite repellent. Protects vegetables and flowers from rabbits and woodchucks.
Leeks . Plant near celery, carrots and onions. Repels carrot flies.
Marigold . Plant near tomatoes, potatoes, eggplant, roses. Deters a wide range of harmful insects.
Nasturtium . Plant near cucumbers, squash, other veggies, and fruit trees. Repels cucumber beetles, white flies and squash bugs. Deters fruit tree borers.
Oregano . Plant near broccoli. Repels white cabbage moth.
Parsley . Grow near asparagus, carrots, tomatoes, roses. Deters carrot fly and beetles.
Pennyroyal . Place near broccoli, brussels sprouts, cabbage. Thwarts ants and cabbage maggots.
Pyrethrum . Plant in both vegetable and flower gardens. Impedes aphids, leafhoppers, ticks, pickleworms and cabbage worms. Repels the dreaded iris borer.
Radish . When you sow vegetable seeds directly in the garden, be sure to sow radish, too. It sprouts quickly, insects get used to the taste, and therefore leave your other, more-cherished seedlings alone.
Rosemary . Plant near carrots, cabbage, beans. Restrains carrot flies and cabbage moths.
Rue . Reportedly repels Japanese beetles.
Sage . Plant near carrots and others. Fends off carrot flies, cabbage moths, ticks.
Soybeans . Adds nitrogen to the soil, a benefit for all heavy-feeders. A possible deterrent for the Japanese beetle.
Summer Savory . Aids beans by frightening the bean beetle.
Thyme . Plant near cabbage to control flea beetles, cabbage maggots, and cabbage moths.
Does companion planting appeal to you? Let me know, in the comments field below.
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