Great companion plants for tomatoes include garlic, onions, chives, lettuce, basil, and sage. Garlic is especially good because it is a powerful insect repellent, so it not only helps the tomato fruits become more flavorful and robust, it tends to repel both aphids and tomato hornworms.
Tomato is a nightshade plant, so avoid planting with other nightshades such as peppers, eggplants, and potatoes, as they are prone to many of the same pests and diseases. In fact, avoid planting nightshade vegetables in the same bed for three years if possible.
But do you mean planted next to eachother, or intermingled? Cucumber vines grow aggressively and can climb all over the tomatoes, starving and suffocating them, not to mention creating a tangle that will make harvesting either more difficult. So planting together is not recommended.
The fact of the matter is that YES the plants are related and YES they share some common diseases but most people do not have the space in their garden to separate them. The reality is that because the two have similar growth requirements, they can in fact be grown quite successfully together.
Brassicas: Brassicas such as broccoli, cauliflower, and cabbage are not good companion plants for peppers as they require similar nutrients from the soil, which can lead to competition and reduced yield.
Compost Tea: One of the best fertilizers composed from leaves or stems for tomatoes (and any other plant) is compost tea that is made by pouring water over compost allowing beneficial microbes to leach into the mixture therefore making it usable as a foliar spray or drench for immediate nutrient supply in tomatoes.
Peppers and chili go well next to cucumbers, especially in a greenhouse you can plant these crops together. To prevent mildew, garlic, onions, chives, marigolds and various herbs such as basil can help.
In general, nightshade plants such as peppers, tomatoes and aubergines can be grown next to zucchinis. Just make sure that all plants have enough space, light and nutrients. However, potatoes are the exception here and are less suitable for growing next to zucchini plants.
Choosing to plant tomatoes near a walnut tree may also negatively affect your crop. Walnut trees release chemicals in the soil that stunt the growth of surrounding plants.
Basil helps tomatoes to overcome insects and diseases. Basil repels flies, mosquitoes, aphids, whiteflies, and tomato hornworms, reducing the need for chemical pesticides. Basil attracts bees, butterflies, beneficial insects, and pollinators, improving pollination.
Tomatoes are also fantastic with fruit such as apricot, lychee, nectarines and peach, or berries like raspberry and strawberry. If you'd like to try an unusual herb pairing, lemon balm is a good choice. You could also look further afield for drinks. Cointreau a flavour match for tomatoes, as is a light, floral gin.
Stunted Growth – Plants in your garden compete for resources like water, nutrients in the soil and sunlight. Tomato plants require a good amount of these resources, so if they're planted closely together, they will compete and likely all lose.
In a raised bed, various herbs such as basil, parsley or dill are good companions for peppers. Lettuce, carrots and onions also make good neighbours for peppers in a raised bed.
Cucumber is a kind of cold-natured food, while peanut contains a lot of oil and fat. If cucumber and peanut interact with each other, it is easy to cause diarrhea.
When you plant tomatoes, plant a little deeper than they come in the pot, all the way up to the bottom few leaves! Tomatoes root along their stems, so this trick helps them develop stronger roots. Tomatoes can be planted a lot deeper because they can produce new roots anywhere along their stems.
Water correctly: Do not overwater. The first week tomato plants are in the ground, they need water every day, but back off watering after the first week, slowly weaning the plants down to 1 to 1.5 inches of water per week.
This fertilizer mix is Pepper Joe's favored method for growing strong, healthy plants. You can typically find Miracle-Gro at a store near you like Walmart, or you can purchase the size you want online. You can use any of Miracle-Grow's Plant Food products or Tomato Plant Food.
Basil. Since a lot of dishes that include tomatoes also use basil for seasoning, it seems like they should be grown together in the garden as well. Many gardeners believe that basil grown as a companion plant will enhance the flavor of the tomatoes.
Tomatoes are prone to magnesium deficiency later in the growing season, which can show with yellowing leaves and diminished production. Ultra Epsom Salt treatments at the beginning of their planting and throughout their seasonal life can help to prevent and remedy magnesium deficiency in your tomato plants.