Rhubarb Root: What It Is, Uses & Important Safety Facts

Rhubarb root refers to the underground part of the rhubarb plant that anchors it and stores energy for yearly growth. While the stalks are widely eaten, the root has a very different role and is not used in everyday cooking.

This guide explains what rhubarb root is, how it’s used, and what you need to know about safety

⭐ Recommended Products — 🌱 Rhubarb & Growing Essentials

Rhubarb is a hardy, productive perennial that’s great for desserts, compotes, and early spring harvests. These essentials will help you grow it successfully and enjoy its harvest year after year.

• Rhubarb Crowns / Plants
Established rhubarb crowns are the easiest way to start — strong plants ready to go in the ground or large containers. Look for reliable varieties like Victoria or Crimson King.
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• Rhubarb Forcers
Special covers used in early spring to ‘force’ tender, pale stems sooner than usual — perfect if you want early harvests and sweeter stalks.
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• Rhubarb Seeds & Starter Kits
If you prefer growing from seed, seed packs with quality varieties give you a head start — ideal for sowing under cover before transplanting later.
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• Garden Compost / Soil Improver for Rhubarb
Rich, well-drained compost or well-rotted manure helps rhubarb establish strong roots and produce big, healthy stems year after year.
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• Rhubarb Growing Guide & Plant Care Book
A helpful reference on planting, forcing, feeding, and harvesting — great for beginners or anyone wanting bigger yields.
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🌱 What Is Rhubarb Root?

Rhubarb root is the thick, woody root system beneath the soil, often called the crown and roots together. It:

• Stores energy over winter
• Produces new shoots each spring
• Allows rhubarb to regrow year after year

Rhubarb is a long-lived perennial, and healthy roots are essential for good harvests.

🌿 Is Rhubarb Root Edible?

No — rhubarb root is not eaten.

• It is tough, bitter, and unpleasant
• It is not used in cooking or baking
• It should not be consumed

Only rhubarb stalks (stems) are eaten.
Rhubarb leaves and roots are not food.

🧪 Rhubarb Root in Traditional Medicine

In some historical and traditional medicine systems, a different species of rhubarb (not common garden rhubarb) was used in dried root form as a strong laxative.

Important points:

• This is not the same as culinary rhubarb grown in gardens
• Medicinal rhubarb root was used in very controlled doses
• Modern use is uncommon due to side effects

Do not attempt to use garden rhubarb root medicinally.

⚠️ Safety Information

• Rhubarb roots may contain toxic compounds
• They should never be eaten raw or cooked
• Not safe for humans or animals
• Not suitable for teas, powders, or extracts

If ingested, medical advice should be sought.

🌱 Rhubarb Root in Gardening

Although not edible, rhubarb roots are very important for growing.

Dividing Rhubarb Roots

• Mature plants (5–7 years old) can be lifted
• Roots can be divided into sections with buds
• Divisions are replanted to create new plants

Best time to divide:

• Autumn or
• Late winter / early spring

🌿 Caring for Healthy Rhubarb Roots

To keep roots strong:

• Plant in deep, fertile soil
• Avoid waterlogged ground
• Mulch annually with compost or manure
• Stop harvesting by late June
• Allow full leaf growth in summer

Healthy roots mean thicker, better-quality stalks.

🧠 Common Questions

Can rhubarb root be composted?
Yes, healthy roots and trimmings can be composted.

Is rhubarb root poisonous like the leaves?
It’s not as well studied, but it is not safe to eat and should be treated as inedible.

What happens if rhubarb roots rot?
Poor drainage can cause crown rot, which kills the plant.

🌿 Final Thoughts

Rhubarb root is essential for growing the plant but has no place in the kitchen. While historically linked to medicinal use in other species, garden rhubarb roots should never be consumed. Focus on keeping the roots healthy, and they’ll reward you with strong growth and generous harvests year after year.

The rule is simple:
Eat the stalks. Grow the roots. Avoid everything else.