15 Plants You Should Never Plant in Your Garden

Check out this list for 15 trees, shrubs, and other plants you should think twice about planting on your property. There are some basic general rules when it comes to plants that should be avoided close to each other. First, check that all the plants in your garden are approximately the same size and have the same light requirements. Planting very tall plants such as tomatoes next to beans, for example, is a very bad idea, since tomatoes are very likely to shade the beans.

Black walnuts have long been known to interfere with garden plants such as tomatoes, eggplants and corn. When planting broccoli in your garden, be sure to practice good crop rotation, as broccoli can leave residues that other cruciferous crops cannot tolerate. Garlic and onions are thought to interfere with the growth of beans and peas, but they seem to be compatible with most other inhabitants of the garden.Mint is a wonderful herb to grow, but it should not be paired with other plants in the garden. Both need water and shade, and are looking for a taller companion with leaves outside, such as beans, to keep the soil moist.

Use thyme as a side dish to celery, which will smother weeds and moisten the soil. Don't grow peppers near eggplants, tomatoes, or potatoes. Also, avoid planting peppers where any other solanaceous crop was grown the year before.Perennials are a great addition to any garden. Plant once and have flowers that bloom for years.

However, some seemingly innocent plants can take over the garden and quickly get out of control. Others bloom for such a short time that it doesn't seem worth it. Some plants will thrive side by side, even benefiting them with nutrients or deterring hungry pests. Others will tear them down as they strip them of nutrients or attract like-minded insects of the not-so-good kind.I want to save beginner gardeners from potential pain until they gain the knowledge and experience needed to keep up with the most aggressive plants.

Be sure to avoid planting beans near other plants in the allium family, such as onions, scallions, and leeks, as well as those in the cabbage family (such as cauliflower, kale, and broccoli). These trees are known for their allelopathy and will kill every type of plant you try to grow, including eggplants, corn, and tomatoes.If you've ever heard of the Three Sisters Garden - which consists of corn, beans and squash - then you'll already know the basic concept of companion planting and what it can do for you in the garden. If you live in a warmer place, you might enjoy 50 more perennials than you'll regret planting - a collection of the perennials that have been disastrous for my readers who garden in other areas of the world.Radishes grow well with all types of plants and are recommended complementary species for beans, beets, carrots, melons, cucumbers, lettuce, parsnips, peas, pumpkins, spinach and many other crops. Lettuce competes for the same nutrients as Allium plants, and garlic and onions also produce chemicals that can inhibit lettuce growth.

Even so, you can often compensate by spacing them out more and providing enough fertilizer and water for both types of plants.For optimal yields of tomatoes avoid planting them next to all members of the cabbage family, corn, dill, other solanaceous plants (eggplants, peppers and potatoes) and fennel. You can also try mixing the plants in a garden bed using the leafy parts of lettuce and spinach to hide the ripe berries.Avoid those that compete for the same nutrients and space and instead opt for classic companion plantings such as corn beans and pumpkins instead. Design your garden with other complementary vegetables such as beets carrots chard cucumbers eggplant lettuce radishes spinach and tomatoes.Gardeners do everything they can to keep their plants happy and healthy but sometimes no matter what you do certain plants just don't go together. Fortunately to keep all those kale chips growing in the garden you can successfully plant them next to garlic and onions dill and nasturtium.

Earl Salstrom
Earl Salstrom

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