Are Rhubarb Leaves Poisonous? Yes — Here’s What You Need to Know

Yes, rhubarb leaves are poisonous and should never be eaten.
Only the stalks (stems) of the rhubarb plant are safe to consume. The leaves contain toxic substances that can be harmful if ingested.

This guide explains why rhubarb leaves are poisonous, what happens if they’re eaten, and how to handle rhubarb safely

⭐ 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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☠️ Why Are Rhubarb Leaves Poisonous?

Rhubarb leaves contain high levels of oxalic acid and soluble oxalate salts, which are toxic to humans and animals.

These substances can:

• Interfere with calcium absorption
• Damage the kidneys
• Cause serious illness if consumed in sufficient quantities

The stalks contain much lower levels and are safe to eat when prepared normally.

⚠️ What Happens If You Eat Rhubarb Leaves?

Eating rhubarb leaves can cause symptoms such as:

• Nausea and vomiting
• Diarrhoea
• Stomach pain
• Weakness or dizziness

In severe cases (especially with large amounts):

• Kidney problems
• Breathing difficulties
• Potentially life-threatening complications

Medical attention should be sought immediately if ingestion is suspected.

🥬 Are Cooked Rhubarb Leaves Safe?

No. Cooking does not make rhubarb leaves safe.

• Oxalic acid is not destroyed by heat
• Boiling, baking, or steaming does not remove the toxins

Rhubarb leaves should never be eaten in any form.

🌿 Which Parts of Rhubarb Are Safe?

✔ Safe to eat

• Rhubarb stalks (raw or cooked)

❌ Not safe to eat

• Rhubarb leaves
• Leaf trimmings
• Leaf-based teas or extracts

Always discard leaves safely.

🐶 Are Rhubarb Leaves Poisonous to Pets?

Yes. Rhubarb leaves are also toxic to:

• Dogs
• Cats
• Livestock

Keep leaves out of reach and do not compost them where animals may access them.

🧑‍🌾 How to Handle Rhubarb Safely

• Cut leaves off immediately after harvesting stalks
• Dispose of leaves in green waste or council compost
• Wash stalks thoroughly before use
• Keep leaves away from children and pets

🧠 Common Questions

Are rhubarb stalks toxic at any time?
No. The stalks are safe to eat, though they become tougher and less pleasant later in summer.

Is oxalic acid dangerous in small amounts?
Small amounts occur naturally in many foods, but rhubarb leaves contain very high levels, making them unsafe.

🌿 Final Thoughts

Rhubarb leaves are definitely poisonous and should never be eaten, cooked, or used in drinks. The stalks, however, are perfectly safe and delicious when prepared properly.

The rule is simple:
Eat the stalks. Discard the leaves.