Choosing the right neighbors for your Brussels sprouts can improve their health and flavor. Understanding brussel sprouts companion plants is a key part of planning a productive garden. This guide will show you which plants to grow alongside them and which to keep far away.
Companion planting is a method of placing plants together for mutual benefit. It can help with pest control, improve soil nutrients, and even enhance growth. For a slow-growing crop like Brussels sprouts, these partnerships are especially valuable.
Brussel Sprouts Companion Plants
This section covers the best plants to grow with your Brussels sprouts. These companions offer specific advantages, from repelling pests to providing ground cover.
The Benefits Of Companion Planting
Companion planting works in several ways. Some plants emit scents that confuse or deter harmful insects. Others attract beneficial insects that prey on pests. Certain companions improve soil structure or add nutrients back into the earth.
For Brussels sprouts, which are in the brassica family, common pests include cabbage worms, aphids, and flea beetles. Good companions can help manage these issues naturally. This reduces the need for chemical interventions.
Top Companion Plants For Brussels Sprouts
Here is a list of the most effective companion plants for Brussels sprouts. Consider interplanting these throughout your garden bed.
- Aromatic Herbs (Dill, Mint, Rosemary, Thyme): Their strong scents mask the smell of Brussels sprouts, repelling cabbage moths and other pests. Be careful with mint, as it can be invasive; it’s best grown in containers.
- Alliums (Onions, Garlic, Chives): These are perhaps the best companions. Their pungent odor deters a wide range of pests, including cabbage loopers, aphids, and even rodents.
- Nasturtiums: These vibrant flowers act as a sacrificial trap crop. Aphids and cabbage worms are attracted to nasturtiums, drawing them away from your sprouts. They are easy to grow and edible.
- Legumes (Beans, Peas): Beans and peas fix nitrogen from the air into the soil. Brussels sprouts are heavy feeders that benefit from this extra nitrogen, promoting lush, green growth.
- Leafy Greens (Spinach, Lettuce): These fast-growing, shallow-rooted plants provide a living mulch. They help suppress weeds and keep the soil cool and moist without competing heavily for nutrients.
- Root Vegetables (Beets, Celery): They occupy a different soil layer than the deeper roots of Brussels sprouts. This minimizes competition and makes efficient use of garden space.
Plants To Avoid Near Brussels Sprouts
Just as some plants help, others can hinder. Avoid planting these near your Brussels sprouts crop.
- Other Brassicas (Cabbage, Broccoli, Cauliflower): They compete for the same nutrients and attract the same pests. Grouping them together creates a target for disease and insects.
- Strawberries: They are believed to inhibit the growth of plants in the brassica family. It’s best to keep them in separate garden sections.
- Tomatoes and Peppers: These heavy feeders will compete directly with Brussels sprouts for soil nutrients. They can also make the soil more susceptible to diseases that affect brassicas.
Creating A Companion Planting Layout
Planning your garden layout is crucial. Here is a simple step-by-step guide to interplanting companions with Brussels sprouts.
- Prepare the Bed: Ensure your soil is rich in organic matter. Brussels sprouts prefer fertile, well-draining soil with a neutral pH.
- Plant Brussels Sprouts: Space your sprouts about 24 inches apart in rows that are 30 inches apart. They need room for their large leaves and tall stalks.
- Interplant Herbs and Alliums: Plant garlic or onion sets between each Brussels sprout plant. Sow dill or thyme seeds in clusters at the ends of rows.
- Add a Border: Plant a border of nasturtiums around the entire bed. This creates a colorful and functional pest barrier.
- Use Ground Cover: Sow lettuce or spinach seeds in the open spaces between the young sprouts. They will be harvested long before the Brussels sprouts need the full space.
Advanced Companion Planting Strategies
Once you understand the basics, you can use more advanced techniques. These strategies maximize the benefits for your entire garden ecosystem.
Using Flowers To Attract Beneficial Insects
Beyond nasturtiums, many flowers are excellent companions. They attract pollinators and predatory insects.
- Marigolds: Their roots release a substance that can deter nematodes in the soil. French marigolds are particularly effective.
- Calendula: Attracts hoverflies, whose larvae consume aphids by the hundreds.
- Sweet Alyssum: This low-growing flower attracts tiny parasitic wasps. These wasps are harmless to humans but lay eggs in pest caterpillars.
Succession Planting With Companions
You can use companion plants in sequence. This keeps your garden productive and protected all season.
For example, plant a fast-growing lettuce as a ground cover in spring. Once you harvest the lettuce, plant a later crop of bush beans. The beans will provide nitrogen for the developing Brussels sprouts. After the bean harvest, you can sow a cover crop like clover to protect the soil over winter.
Companion Planting For Disease Prevention
Proper spacing with companions improves air circulation. This is vital for preventing fungal diseases like mildew. The strong scents of herbs and alliums may also help disrupt the spread of certain diseases.
Avoid overhead watering, which can promote disease. Using soaker hoses or drip irrigation is a better choice, especially in a dense planting scheme.
Common Problems and Companion Solutions
Even with companions, you may encounter issues. Here’s how to use companion planting to address specific Brussels sprouts problems.
Managing Cabbage Worms And Loopers
These green caterpillars are a primary pest. They can quickly defoliate plants.
- Companion Solution: Interplant with lots of thyme and oregano. Their strong oils repel the moths that lay the eggs. Also, plant plenty of nasturtiums as a trap crop.
- Additional Action: Check the undersides of leaves regularly for eggs and handpick any caterpillars you find.
Deterring Aphid Infestations
Aphids love to cluster on the undersides of brassica leaves.
- Companion Solution: Chives and garlic are excellent aphid deterrents. Also, plant calendula and sweet alyssum to attract ladybugs and lacewings, which are natural aphid predators.
- Additional Action: A strong spray of water from the hose can dislodge aphid colonies.
Improving Slow Growth
If your sprouts are stunted, they may need more nutrients.
- Companion Solution: Ensure you have nitrogen-fixing plants like bush beans nearby. Avoid planting heavy feeders like corn or tomatoes in the same bed.
- Additional Action: Side-dress your Brussels sprouts with compost or a balanced organic fertilizer midway through the growing season.
Seasonal Care With Companions
Your companion planting strategy should evolve with the seasons. Brussels sprouts have a long growing period, often harvested after a frost.
Spring Planting And Early Companions
Start your Brussels sprouts indoors or plant seedlings outdoors after the last frost. At this stage, focus on quick-growing companions that won’t shade the young sprouts.
- Plant lettuce, radishes, or spinach between seedlings.
- Sow dill and cilantro seeds at the row ends.
- Plant onion sets or garlic cloves around the perimeter.
Summer Maintenance
As the weather warms, pest pressure increases. Your aromatic herbs and flowers become most important.
- Ensure nasturtiums and marigolds are flourishing.
- Pinch back herbs to encourage bushy growth and more scent production.
- If you planted early beans, they will be fixing nitrogen now.
Fall Harvest And Transition
Brussels sprouts taste best after a light frost. As you prepare for harvest, think about next year’s garden.
- After harvesting sprouts, remove the plant stalk but leave the roots to decompose.
- Plant a winter cover crop like winter rye or hairy vetch in the empty space. This protects soil and adds organic matter.
- Take notes on what companion combinations worked best for you this year.
Frequently Asked Questions
What Are The Best Plants To Grow With Brussels Sprouts?
The best companion plants for brussels sprouts are aromatic herbs like dill and thyme, alliums like garlic and onions, nasturtiums, and nitrogen-fixing beans. These help deter pests and improve soil.
Can You Plant Tomatoes Next To Brussels Sprouts?
It is not recommended. Tomatoes and Brussels sprouts are both heavy feeders and will compete for nutrients. They can also make eachother more susceptible to soil-borne diseases.
Do Marigolds Help Brussels Sprouts?
Yes, marigolds are excellent companions. Their roots can help suppress harmful nematodes in the soil, and their scent may help deter other pests. French marigolds are considered the most effective type for this purpose.
How Far Apart Should Companion Plants Be?
This depends on the plant. Low-growing herbs and greens can be planted quite close, within 6-12 inches of the Brussels sprout stalk. Taller plants or those with spreading roots should be given more space, at least 18 inches away, to avoid competition for light and water.
What Should You Not Plant Near Brussels Sprouts?
Avoid planting other brassicas like cabbage or broccoli, as well as strawberries, tomatoes, and peppers. These plants compete for resources or may attract similar pests and diseases, creating a larger problem in your garden.