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If your rhubarb plant is getting crowded or producing fewer stalks, it may be time to divide it.
Dividing rhubarb is an easy way to rejuvenate older plants, grow more rhubarb for free, and keep your patch productive for years.
Looking for more rhubarb ideas? Explore my full Rhubarb Recipes, DIY & Growing Guide here.
Why Divide Rhubarb?
Dividing rhubarb helps:
- Revive older plants
- Increase harvests
- Prevent overcrowding
- Create new plants for other garden spots
- Share plants with friends
Most rhubarb plants benefit from dividing every 4 to 6 years.
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Best Time to Divide Rhubarb
The best time to divide rhubarb is:
Early Spring
Just as new growth begins to emerge.
This gives roots time to establish before summer heat.
Late Fall
After foliage dies back, while the plant is dormant.
Spring is usually easiest for most gardeners.
Related: When to Pick Rhubarb: A Guide to Harvesting
What You’ll Need
- Sharp spade or garden fork
- Garden knife or shovel
- Compost or aged manure
- Mulch
- Water
How to Divide Rhubarb Step-by-Step
Step 1: Dig Up the Plant
Dig around the outside of the crown carefully.
Lift the entire plant from the ground, keeping as many roots intact as possible.
Step 2: Split the Crown
Use a sharp spade or knife to divide the crown into sections.
Each section should have:
- At least 1 healthy bud (eye)
- Strong roots attached
Larger divisions establish fastest.
Step 3: Replant Immediately
Choose a sunny location with rich, well-drained soil.
Plant divisions so the crown sits just below soil level.
Space plants about 3 to 4 feet apart.
Step 4: Water Well
Water deeply after planting.
Keep soil evenly moist while new roots establish.
Step 5: Mulch
Add mulch around plants to hold moisture and suppress weeds.
Keep mulch slightly away from the crown.
Aftercare for New Rhubarb Plants
During the first season:
- Water regularly
- Keep weeds down
- Add compost around plants
- Avoid heavy harvesting
Let plants focus on root growth first.
When Can You Harvest Divided Rhubarb?
Light harvesting may be possible the next season.
For strongest plants, wait until year two for full harvests.
Signs Your Rhubarb Needs Dividing
You may notice:
- Smaller stalks
- Fewer stems
- Crowded center
- Slow growth
- Older plants declining
Can You Divide Rhubarb in Summer?
It’s possible, but not ideal.
Hot weather increases transplant stress.
Spring or fall gives best results.
More Rhubarb Tips & Recipes
You might also enjoy:
Browse my full Rhubarb Recipes, DIY & Growing Guide here.
FAQs
How often should I divide rhubarb?
Every 4–6 years is common.
Can I divide a young plant?
It’s better to wait until plants are mature and well established.
Does dividing help production?
Yes. Older crowded plants often produce better after division.
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