How to Look After Rhubarb in Autumn and Winter – Complete UK Guide

Rhubarb is one of the most rewarding crops you can grow in a British garden or allotment. Once established, a healthy rhubarb plant can provide delicious stems for many years, making it a fantastic investment for anyone who enjoys growing their own food.

However, although rhubarb is relatively easy to grow, looking after it properly during autumn and winter can make a big difference to how well it performs the following spring.

As temperatures drop and the growing season comes to an end, rhubarb plants begin preparing for their winter dormancy. Their large leaves gradually turn yellow, the stems collapse, and the plant starts conserving energy in its underground crown and roots.

This is completely normal and an important part of the plant’s annual growing cycle.

Here at Gardening with Ben, we’re looking at everything you need to know about rhubarb care in autumn and winter, including when to cut back the leaves, whether to feed your plants, how to mulch correctly and what to do if your rhubarb isn’t growing particularly well.

Whether you’re growing rhubarb in an allotment, vegetable garden or large container, these practical tips will help you prepare your plants for another productive growing season.

What Happens to Rhubarb During Autumn?

Rhubarb is a hardy perennial, meaning it returns year after year without needing to be replanted.

During spring and summer, its large leaves collect sunlight and produce energy through photosynthesis. Some of this energy is stored in the thick underground crown and root system.

As autumn arrives and daylight hours become shorter, the plant gradually slows down.

You may notice several changes:

• Large green leaves begin turning yellow or brown.
• Older stalks soften and collapse.
• New growth becomes slower or stops completely.
• The plant gradually dies back to ground level.
• Dormant buds remain in the crown, ready for spring.

Don’t worry if your rhubarb appears to have completely disappeared by December. In most cases, this simply means it has entered dormancy.

In fact, rhubarb benefits from a period of winter cold. Chilling helps the plant complete its natural resting cycle before producing fresh growth when conditions improve.

When Should You Cut Back Rhubarb in Autumn?

One of the most common questions gardeners ask is whether they should cut their rhubarb down as soon as autumn arrives.

The answer is no. It’s better to let the foliage die back naturally.

While the leaves remain healthy and green, they continue producing energy that helps strengthen the plant for next year’s harvest.

Removing them too early can reduce the amount of energy stored in the crown.

How to Cut Back Rhubarb Correctly

Once the leaves have turned yellow or brown and started collapsing, you can begin tidying the plant.

1. Wait until the foliage has naturally died back, usually during October or November, depending on the weather.
2. Remove any completely dead leaves and collapsed stalks.
3. Gently pull away loose, decaying stems or cut them close to their base without damaging the crown.
4. Clear fallen plant debris from around the growing points.
5. Check that the crown remains firm and healthy.

There’s no need to dig up the plant or cut into its underground crown.

Gardening with Ben tip: Don’t be tempted to tidy your rhubarb too early. Leaving healthy foliage in place for as long as possible helps the plant build up reserves for the following spring.

Should You Remove All Rhubarb Leaves Before Winter?

Once your rhubarb has completely died back, removing the old leaves is generally beneficial.

This helps keep the growing area tidy and prevents large amounts of decaying foliage from sitting directly over the crown.

It also exposes the dormant growing points to the cold temperatures rhubarb needs for healthy spring growth.

However, it’s important to distinguish between dead leaves and healthy ones.

If your rhubarb still has several green leaves in early autumn, leave them alone.

If the foliage has turned brown and collapsed following cold weather, it’s fine to remove it.

Can Rhubarb Leaves Go in the Compost Bin?

Yes, rhubarb leaves can be added to a normal garden compost heap.

Although rhubarb leaves contain toxic substances, including oxalic acid, these break down during the composting process.

Chop large leaves into smaller pieces to help them decompose more quickly.

Never eat rhubarb leaves or feed them to pets or livestock. Only the edible stalks should be used in cooking.

Should You Mulch Rhubarb in Autumn and Winter?

Mulching is an excellent way to improve the soil around established rhubarb plants.

Rhubarb enjoys fertile soil containing plenty of organic matter, and adding compost or well-rotted manure can help maintain good growing conditions.

Suitable materials include:

• Homemade garden compost.
• Well-rotted farmyard manure.
• Leaf mould.
• Other fully decomposed organic soil improvers.

A layer of organic matter around the plant helps improve soil structure, encourages earthworms and adds nutrients as it gradually breaks down.

How to Mulch Rhubarb Properly

Spread the organic material over the surrounding soil, leaving the crown and growing buds uncovered.

A layer approximately 5–7cm deep is suitable for many established plants, particularly when mulching in late winter or spring.

Avoid piling manure directly over the crown.

This is especially important on heavy clay soil, where excessive moisture can encourage rotting.

Rhubarb is naturally hardy, so the purpose of mulching is mainly to improve soil conditions rather than protect the crown from ordinary British winter temperatures.

Gardening with Ben tip: If your allotment has heavy, wet soil, concentrate on improving drainage and soil structure. A healthy rhubarb crown dislikes sitting in waterlogged ground throughout winter.

Should You Feed Rhubarb in Autumn?

Rhubarb is a hungry plant during its growing season, but autumn is not usually the best time to apply a strong fertiliser.

By this point, the plant is slowing down and preparing for dormancy.

Applying a high-nitrogen feed late in the year is unlikely to provide much benefit and may encourage unwanted soft growth during mild weather.

Instead, concentrate on maintaining healthy soil with well-rotted organic matter.

When Is the Best Time to Feed Rhubarb?

Spring is generally the best time to provide additional nutrients.

As new shoots begin emerging, you can apply a suitable general-purpose fertiliser if your soil needs it.

Plants growing in fertile soil with regular organic mulching may not require much additional feeding.

Avoid excessive fertiliser, particularly high-nitrogen products, because too much nitrogen can encourage lush foliage and may contribute to flowering problems.

The aim is to support steady, healthy growth rather than force the plant to produce large amounts of foliage.

Does Rhubarb Need Protecting from Frost?

Established rhubarb is extremely hardy and normally survives British winters without special frost protection.

In fact, winter chilling is an important part of its growing cycle.

You generally don’t need to cover an established crown with fleece, move it into a greenhouse or surround it with thick insulating material.

Leaving the dormant crown exposed to normal winter conditions is perfectly acceptable.

When Might Protection Be Necessary?

There are a few exceptions.

Newly planted rhubarb in containers may be more vulnerable to prolonged freezing because the roots are less insulated than those growing in open ground.

Containers should also have adequate drainage to prevent the compost becoming waterlogged.

If tender new shoots emerge during a mild spell and a severe frost is forecast, temporary horticultural fleece can help protect that young growth.

The dormant crown itself is much tougher than the emerging stems.

How to Prevent Rhubarb Crown Rot in Winter

One of the biggest threats to rhubarb during winter isn’t frost. It’s waterlogging.

Rhubarb enjoys moisture during active growth, but its crown can rot if it remains in saturated soil for long periods.

This is particularly important in areas with heavy clay soil or poorly drained allotment beds.

Signs of Possible Crown Rot

Watch for:

• A crown that feels unusually soft or mushy.
• Dark, decaying tissue around the growing points.
• An unpleasant rotting smell.
• Sections of the crown collapsing.
• Little or no healthy growth the following spring.

A dormant crown may look brown and woody, which is normal. The concern is when the tissue becomes soft and rotten.

How to Reduce the Risk

Choose a well-drained planting position, avoid burying the crown beneath thick layers of mulch and make sure water doesn’t collect around the plant.

If your rhubarb is growing in a particularly wet area, consider improving drainage or moving a healthy division to a better position during dormancy.

Severely rotten or diseased material should not be replanted.

Can You Divide Rhubarb in Autumn?

Yes. Autumn and winter are excellent times to divide established rhubarb plants while they’re dormant.

Over time, a rhubarb crown can become large and congested.

You might notice that an older plant produces lots of thin stems rather than the thick, vigorous stalks it once provided.

Dividing the crown can rejuvenate the plant and provide additional rhubarb plants for your garden.

When to Divide Rhubarb

November through to early spring is generally a suitable period, provided the ground isn’t frozen or waterlogged.

Plants that have been growing for approximately five years or longer may benefit from division if they’re becoming overcrowded or less productive.

Step-by-Step Guide to Dividing Rhubarb

1. Wait until the plant is dormant and its foliage has died back.
2. Carefully dig around the crown with a garden fork or spade.
3. Lift the crown, keeping as much healthy root attached as possible.
4. Examine it for healthy buds and firm sections of rhizome.
5. Divide it using a sharp spade, ensuring each section has at least one healthy growing bud and a portion of root.
6. Discard old, rotten or unhealthy sections.
7. Replant the divisions into prepared, fertile soil.

Space plants approximately 90cm–1m apart so they have enough room to develop.

Position the growing buds at or just above soil level, taking particular care not to bury them deeply in wet soil.

Water after planting if the ground is dry.

Avoid harvesting newly divided plants in their first growing season, allowing them to establish strong roots.

Can You Plant New Rhubarb Crowns in Winter?

Absolutely. Winter is one of the best times to plant dormant, bare-root rhubarb crowns.

In the UK, bare-root crowns are commonly available between November and March.

Planting during dormancy allows the roots to establish before vigorous spring growth begins.

Choose a sunny position with fertile, moisture-retentive but well-drained soil.

Before planting, remove perennial weeds and incorporate well-rotted compost or manure.

Dig a hole large enough to accommodate the roots without forcing them into a tight space.

Position the crown carefully, backfill with soil and firm gently.

If you’re planting several crowns, remember that mature rhubarb plants can become surprisingly large.

Giving them sufficient space now will save problems later.

How to Force Rhubarb for an Earlier Harvest

Forcing rhubarb is a traditional gardening technique used to produce tender, pale stems earlier than normal.

It works by excluding light from the growing shoots.

The resulting stalks are often beautifully coloured, tender and particularly good for cooking.

How to Force Rhubarb

Choose a large, healthy, established plant that hasn’t been forced recently.

During mid-winter, usually December or January, place a traditional rhubarb forcing pot or a tall, lightproof container over the crown.

Make sure the container excludes light and has enough space for the stems to grow.

The plant should already have experienced sufficient winter chilling.

As temperatures gradually improve, new stems will begin growing inside the dark container.

Check regularly and harvest the stems when they’re ready, often within four to eight weeks, depending on the variety and conditions.

Does Forcing Weaken Rhubarb?

Yes. Forcing uses stored energy in the crown and can reduce the plant’s vigour.

After harvesting the forced crop, remove the covering and allow the plant to recover.

Avoid forcing the same crown in consecutive years.

Forcing is best reserved for mature, healthy plants rather than newly planted or recently divided crowns.

Should You Water Rhubarb During Winter?

Established rhubarb growing in the ground rarely needs additional watering during a normal British winter.

Rainfall usually provides more than enough moisture.

In fact, overwatering dormant rhubarb can increase the risk of crown rot.

If you’re growing rhubarb in a container, check the compost occasionally.

It shouldn’t become completely dry for prolonged periods, but it must never remain saturated.

Make sure drainage holes are clear and avoid leaving containers standing in trays of water.

Common Rhubarb Problems During Autumn and Winter

My Rhubarb Has Completely Disappeared

This is normal during dormancy. Rhubarb dies back to ground level and usually returns in spring.

My Rhubarb Crown Looks Brown

Dormant crowns often look brown and woody. Check that the crown is firm rather than soft or rotten.

My Rhubarb Is Producing Thin Stalks

Thin stalks can indicate an overcrowded or ageing crown, poor growing conditions or insufficient nutrients.

Consider dividing a mature crown during dormancy and improving the surrounding soil.

My Rhubarb Has Started Growing in Winter

Mild weather can occasionally encourage early shoots.

Avoid unnecessary feeding and protect particularly tender emerging growth if severe frost is forecast.

My Rhubarb Isn’t Growing in Spring

Check whether the crown has rotted, whether the soil is waterlogged or whether the plant has become overcrowded.

Be patient during cold springs, as some varieties naturally emerge later than others.

Rhubarb Care Calendar for UK Gardeners

Month	What to Do
September	Finish harvesting and allow healthy leaves to continue growing.
October	Let foliage die back naturally and begin clearing dead leaves.
November	Remove dead foliage, divide mature crowns and plant new bare-root rhubarb.
December	Check drainage and consider forcing a healthy established crown.
January	Continue winter checks and monitor any rhubarb being forced.
February	Prepare for new growth and mulch around crowns without covering the buds.
March	Watch for emerging shoots and feed if necessary.

These timings are approximate. Weather conditions vary across the UK, and gardeners in colder northern areas may see growth later than those in milder regions.

Frequently Asked Questions About Winter Rhubarb Care

Should I cut rhubarb down in October?

Only remove foliage that has naturally died back. If the leaves are still green and healthy, leave them to continue feeding the crown.

Can rhubarb survive snow and frost?

Yes. Established rhubarb is very hardy and normally survives British winter conditions without protection.

Should I cover my rhubarb crown with manure?

Apply well-rotted manure around the plant rather than directly over the crown. Burying the growing buds can encourage rotting.

Can I harvest rhubarb in winter?

Ordinary outdoor rhubarb is generally dormant in winter. However, mature plants can be forced to produce an earlier crop under suitable conditions.

Why has my rhubarb turned yellow?

Yellowing leaves during autumn are normally part of the natural dormancy process. Yellowing during the active growing season may have other causes, including water stress or poor soil conditions.

How many years does a rhubarb plant last?

Rhubarb can remain productive for ten years or considerably longer when grown in suitable conditions. Dividing overcrowded crowns helps maintain healthy growth.

Is it better to divide rhubarb in autumn or spring?

Both can work. The best time is during dormancy, from mid-autumn until early spring, when the soil is workable.

Final Thoughts: Preparing Rhubarb for a Healthy Spring Harvest

Looking after rhubarb in autumn and winter doesn’t need to be complicated.

The most important thing is to understand that rhubarb naturally needs a period of dormancy.

Allowing the leaves to die back, keeping the crown free from rotting debris, improving the surrounding soil and avoiding waterlogging will help your plants remain healthy throughout winter.

If you have an older, overcrowded crown, this is also an excellent opportunity to divide it and produce additional plants.

With a little attention during the colder months, your rhubarb can return in spring with vigorous new growth and provide another fantastic harvest.

Here at Gardening with Ben, we believe that understanding your plants throughout every season is one of the best ways to become a more successful gardener.

Keep smiling, keep shining, keep gardening with Ben!