Last Updated on June 3, 2025 by Jocelyn
In organic gardening, companion planting helps protect collards from pests and supports growth. Dill attracts beneficial wasps, while chamomile repels insects.
Onions, beets, and celery are also compatible. However, avoid planting collards near potatoes, strawberries, or other brassicas due to shared nutrient needs and disease risk.
The Benefits of Companion Planting
When I started growing collards, I discovered how companion plants could make a huge difference.
By planting certain flowers, herbs, and even legumes alongside my collards, I noticed improvements in soil health and fewer pests.
Not only did these plants act as repellents, but some also added a savory flavor to my dishes. Let me share some of the benefits I’ve experienced.
- Mint and marigolds have a strong scent that confuses insects and pests, making it harder for them to find my collards.
- Nasturtium flowers add a peppery zing and palate-pleasing pop to the taste of collard dishes.
- Legumes like peas and beans are natural nitrogen fixers, helping to replenish the nutrients in the soil after the intense feeding routines of collards.
- Deep-rooted plants such as comfrey and yarrow help to break up compacted soil and draw nutrients to the surface, making these nutrients more accessible for collards.
- The aroma of onions and garlic not only deters pests but also adds a pungent and savory dimension to the flavor of collards.
- Predatory wasps and beneficial insects like bees are attracted by these companion plants, helping to keep harmful pests in check.
Best Companion Plants for Collard Greens
In my experience, the best way to ensure healthy greens is to create a list of helpful companion plants.
Collard greens have the same likes as other members of their family, so planting herbs and other aromatic plants can be really helpful.
These plants help in repelling pests like the white cabbage butterfly. This method has kept my cabbage family members safe and thriving!
| No. | Companion Plant | Benefits |
| 1 | Celery | Keeps pests away and enhances the flavor of nearby plants. |
| 2 | Dill | Attracts beneficial insects that eat pests, providing natural pest control. |
| 3 | Onion | Repels many common pests with its strong smell. |
| 4 | Rosemary | Deters pests and offers aromatic benefits to the garden. |
| 5 | Sage | Repels insects while adding a unique flavor to the garden. |
| 6 | Thyme | Attracts beneficial insects and helps improve plant health. |
| 7 | Oregano | Repels pests and contributes a robust flavor. |
| 8 | Nasturtiums | Act as a trap plant for aphids and whiteflies, also adding a peppery taste. |
| 9 | Marigold | Suppresses nematodes and deters harmful insects with its aromatic roots. |
| 10 | Mint | Repels pests like cabbage moths and adds a refreshing flavor. |
What Not to Grow With Collard
When growing collards, avoid planting tall plants like tomatoes as they can block sunlight. Low-growing herbs are better companions because they offer protection without competing for light.
Ensure the soil has the right moisture and nutrient balance to meet the needs of all plants involved.
Collards share similar requirements with other brassicaceae like kale, cabbages, and brussels sprouts, and improper planning can create enemies instead of helpers.
When planting collards, it’s important to know which plants to avoid. Some plants can cause problems for collards. Here’s a handy table to remember:
| No. | Plants to Avoid | Reason |
| 1 | Broccoli | Competes for nutrients |
| 2 | Cabbage | Attracts the same pests |
| 3 | Cauliflower | Needs similar space and nutrients |
| 4 | Kale | Shares diseases with collards |
| 5 | Kohlrabi | Can stunt collard growth |
| 6 | Strawberries | Have different water needs |
| 7 | Tomatoes | Compete for resources |
For more insights on companion planting, explore my additional guides:
Ideal Growing Conditions for Collard
Collard greens thrive in full sun but can manage with partial shade in warm climates. They prefer well-drained soil that’s rich in organic matter and slightly acidic. Keeping the soil consistently moist helps prevent drought stress.
By following the steps below, you can enjoy strong, healthy collard greens throughout the growing season.
Proper Spacing for Optimal Growth
To avoid improper spacing and dense planting, plant collard greens about 18 inches apart. This ensures they have room to grow and reduces the risk of disease.
Planting seeds 1/4 inch deep in a garden bed, container, or grow bag is ideal.
Seasonal Planting
Collard greens are a cool season crop. Plant them in early spring after the last frost or in late summer before the first frost. They grow best when temperatures are between 55-75 degrees Fahrenheit.
Watering Needs
Collards need moderate watering. In cooler seasons, once in the morning is enough. In summer heat, water early and again if needed to avoid browning.
Aim for one and a half inches of water per week, focusing on the base to prevent powdery mildew.
Soil and Fertilizing
Use well-draining soil with a neutral pH of 6.5-7.0. Collard greens need nitrogen, so enrich the soil with compost or a high-nitrogen fertilizer. Regular foliar feed and compost tea can keep your plants vibrant.
Pruning and Maintenance
Prune your collard greens if they start to bolt. Use clean pruning snips to cut the bolts and encourage leaf production. Harvest leaves when they are 10 inches long, starting from the outer leaves and moving inward.
FAQ’s
Q: What Are the Best Growing Conditions for Collard?
A: Collards, grow best in full sun and rich soil. They need regular watering but not too much. Use plenty of compost for feeding.
When planting, leave about a foot of space around each plant. Once established, collards become drought-hardy and may grow tall, so they might need support.
Q: Are Collards Acid Loving Plants?
A: Collards thrive in slightly acidic soil, with a pH between 5.8 and 6.5.
In the Southeast United States, where they were developed, the soil is naturally on the acidic side. Always plant collards in full sun for the best growth.
Q: What Is the Best Fertilizer for Collards?
A: To make sure your collards grow large and healthy, you should use a nitrogen fertilizer. A good option is 21-0-0. You should apply ¼ pound of this fertilizer per 100 square feet.
First, add it 3 to 5 weeks after the seed comes up or after transplanting. Then, add more every 2 to 3 weeks. These repetitive applications of nitrogen help ensure a good harvest.
Q: What Size Container to Grow Collards?
A: When you’re ready to grow collards at home, choosing the right size container is crucial. For minimum size, use a container that holds at least 2 gallons and is 8-9 inches in diameter.
However, the preferred size is a 5-gallon container with a 12-inch diameter. This will give your collards ample room to grow and thrive.
Q: When’s the Best Time to Plant Collard Greens?
A: Spring Planting: Start seeds indoors about 6 weeks before the last frost date in spring. Transplant outdoors 2 to 4 weeks before the last frost or direct-sow seeds outdoors during this time.
Fall Planting: Direct-sow seeds outdoors 2 to 3 months before the first frost date in fall to ensure growth before the cold arrives.
Conclusion
Using companion plants is a smart way to help your collard greens grow strong and healthy. Good companions can keep pests away and improve the soil, while bad ones can cause problems.
By carefully selecting the right plants to grow with your collards, you can create a thriving and productive garden. Following these tips ensures successful growth and a bountiful harvest.
