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Rhubarb is easy to grow, but planting it with the wrong companions can lead to smaller harvests and weaker plants.
Some plants compete for nutrients, require different growing conditions, or crowd rhubarb’s space. Knowing what not to plant with rhubarb can help you grow healthier plants and get better results.
Looking for more ideas? Visit my full Rhubarb Recipes, DIY & Growing Guide.
What Rhubarb Needs to Thrive
Before choosing companion plants, it helps to understand what rhubarb prefers:
- Full sun to partial shade
- Rich, well-drained soil
- Consistent moisture
- Plenty of space to grow
Plants with very different needs can cause problems.
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What Not to Plant with Rhubarb
Avoid these plants when planning your garden:
Drought-Tolerant Herbs
- Lavender
- Rosemary
These plants prefer dry soil, while rhubarb needs consistent moisture.
Root Vegetables
- Carrots
- Potatoes
They compete with rhubarb for nutrients underground and can limit growth.
Aggressive Spreaders
- Mint
- Invasive ground covers
These plants can quickly take over and crowd rhubarb roots.
Large or Dense Plants
- Large shrubs
- Tall vegetables
They can block sunlight and reduce airflow.
Heavy Feeders
- Corn
- Other nutrient-demanding crops
These compete for nutrients rhubarb needs to thrive.
Why These Plants Don’t Work
Planting the wrong companions can:
- Reduce rhubarb growth
- Lead to smaller stalks
- Increase competition for water and nutrients
- Limit sunlight and airflow
Rhubarb grows best when it has space and consistent conditions.
What to Plant Instead
Choose plants that:
- Prefer similar soil and moisture
- Don’t compete aggressively
- Grow well in full sun
See: Best Companion Plants for Rhubarb
Tips for Healthy Rhubarb
- Give plants plenty of space
- Keep soil consistently moist
- Add compost for nutrients
- Avoid overcrowding
Learn more: When to Harvest Rhubarb
FAQs
Can you plant rhubarb with lavender?
No—lavender prefers dry soil, while rhubarb needs more moisture.
Does rhubarb need a lot of space?
Yes—it spreads and needs room to grow properly.
What grows well with rhubarb?
Strawberries, garlic, and beans are great companion plants.
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