Rhubarb is a perennial vegetable often grown for its tart, red stalks, which are commonly used in pies, jams, and sauces. While it is relatively low-maintenance, rhubarb can greatly benefit from companion planting. Companion planting is the practice of growing certain plants together to improve growth, deter pests, and enhance soil health.
By strategically planting rhubarb alongside compatible plants, you can create a healthier and more productive garden. In this guide, we will explore the best companion plants for rhubarb, plants to avoid, and essential tips for successfully growing companion plants with rhubarb.
Why You Should Consider Companion Planting for Rhubarb
Companion planting offers several advantages for rhubarb, making it a smart choice for any gardener. Here are some key reasons why you should consider it:
1. Pest Control
Rhubarb can attract certain pests, including aphids, slugs, and weevils. By planting specific companion plants, you can naturally repel these pests, reducing the need for chemical pesticides.
2. Improved Soil Health
Certain plants help maintain soil nutrients, prevent erosion, and improve overall soil structure. Companion planting ensures that rhubarb gets the nutrients it needs without excessive fertilization.
3. Enhanced Growth and Yield
Some companion plants release beneficial compounds that can encourage rhubarb to grow stronger and produce higher yields.
4. Weed Suppression
By planting low-growing companion plants around rhubarb, you can help suppress weed growth, reducing competition for nutrients and water.
5. Pollinator Attraction
Some companion plants attract bees and other beneficial insects that improve pollination in your garden, leading to a more productive and thriving environment.
Best Companion Plants for Rhubarb
When selecting companion plants for rhubarb, it’s essential to choose those that either provide protection, improve soil quality, or do not compete with rhubarb’s needs. Here are some of the best companion plants:
1. Garlic and Onions
- Repel aphids and other pests that may attack rhubarb.
- Enhance soil health by deterring soil-borne pathogens.
- Do not compete heavily for nutrients or water.
2. Chives
- Naturally repel aphids and Japanese beetles.
- Improve the overall flavor of nearby crops.
- Attract beneficial pollinators.
3. Beans and Peas
- Help fix nitrogen in the soil, which benefits rhubarb’s growth.
- Do not interfere with rhubarb’s deep root system.
- Improve overall soil fertility.
4. Strawberries
- Form a natural ground cover that helps suppress weeds.
- Provide shade and moisture retention, which benefits rhubarb in dry climates.
- Enhance biodiversity, reducing the likelihood of pest infestations.
5. Brassicas (Cabbage, Kale, Broccoli, and Cauliflower)
- Thrive alongside rhubarb without competing for resources.
- Help repel certain insect pests such as flea beetles and cabbage worms.
6. Marigolds
- Repel nematodes, aphids, and other harmful pests.
- Attract pollinators and beneficial insects.
- Improve overall garden aesthetics.
7. Horseradish
- Acts as a natural pest deterrent for many garden pests.
- Grows well near rhubarb without competing for nutrients.
8. Comfrey
- Enhances soil health by drawing nutrients from deep within the soil.
- Can be used as a natural mulch or compost booster.
9. Nasturtiums
- Attract aphids away from rhubarb, acting as a trap crop.
- Bring pollinators to the garden.
- Improve the visual appeal of the garden.
Plants to Avoid Planting Near Rhubarb
While some plants are beneficial for rhubarb, others can hinder its growth or attract pests that may damage the plant. Here are plants to avoid growing near rhubarb:
1. Potatoes
- Require a lot of nutrients, which may compete with rhubarb.
- Can attract pests like blight and beetles that may harm rhubarb.
2. Tomatoes
- Susceptible to some of the same diseases as rhubarb.
- Can compete for nutrients and water.
3. Pumpkins and Squash
- Their sprawling vines can crowd out rhubarb and restrict airflow.
- Require high amounts of nutrients, depleting soil fertility.
4. Sunflowers
- Release substances into the soil that may inhibit rhubarb’s growth.
- Can cast excessive shade, reducing rhubarb’s access to sunlight.
5. Melons and Cucumbers
- Compete for nutrients and space.
- Attract pests that may also affect rhubarb.
Tips for Growing Companion Plants with Rhubarb
Successfully implementing companion planting requires careful planning. Here are some essential tips to help you grow rhubarb and its companions effectively:
1. Provide Adequate Spacing
- Rhubarb has a deep root system and requires space to grow properly. Ensure companion plants do not crowd rhubarb, which could lead to poor air circulation and increased disease risk.
2. Use Mulching to Improve Soil Health
- Apply mulch around rhubarb and companion plants to retain moisture, suppress weeds, and improve soil fertility.
3. Rotate Crops Each Season
- Prevent soil depletion and disease buildup by rotating companion plants around rhubarb each year.
4. Water Wisely
- Rhubarb needs consistent moisture, but overwatering can lead to root rot. Ensure that companion plants have similar water needs to avoid over- or underwatering.
5. Monitor for Pests Regularly
- Even with companion planting, occasional pest infestations may occur. Inspect plants regularly and take action if necessary by using organic pest control methods.
6. Fertilize as Needed
- While companion planting can enhance soil nutrients, additional compost or organic fertilizer may be required to maintain optimal growth.
7. Encourage Beneficial Insects
- Plant flowers like marigolds and nasturtiums nearby to attract pollinators and natural predators of garden pests.
8. Harvest Rhubarb Properly
- Avoid overharvesting rhubarb, especially in its first year. Leave enough leaves for the plant to continue growing robustly.
Final Thoughts
Companion planting is an effective and natural way to improve the health and productivity of your rhubarb plants. By choosing the right companion plants, you can deter pests, enhance soil fertility, and encourage a thriving garden ecosystem. Avoid planting incompatible species that may compete for resources or introduce diseases.
With proper planning, spacing, and care, your rhubarb patch will flourish, providing you with bountiful harvests for years to come. Whether you are growing rhubarb for culinary use or ornamental value, companion planting can make a significant difference in your gardening success!
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