How to prune a pollarded willow traditionally: annual care

What is a pollarded willow?

A pollarded willow is not a separate species - it is a pruning form. A normal willow (usually Salix alba, white willow) is repeatedly cut back in the same way over years, creating a thick "knot" (swelling) where all branches emerge from. This is called pollarding and is a very old Dutch tradition. Pollarded willows are not only practical (they produced thin branches for basketry) but also very picturesque and characteristic of the Dutch landscape.

A mature pollarded willow looks like a very thick trunk with an enormous bulbous swelling at the top, from which many thin, long branches grow each year. Traditionally, these branches were harvested annually for various uses.

Building the knot

If you start with a normal willow and want to transform it into a pollard, you begin in the first year after planting. In March, cut the entire tree back to roughly 2-2.5 meters above ground. This sounds drastic, but that is the goal. Let all side shoots that emerge grow freely. You do this every year, cutting back to the same spot, until the swelling (knot) becomes visible. After 3-4 years you see a substantial knot-forming bulge where all new branches emerge.

Important: you always cut back to the same height. This becomes the pruning line. This creates the characteristic knot.

Annual maintenance of the pollarded willow

Once established (knot formed), the maintenance work is very regular:

Each spring (March): Cut all thin branches emerging from the knot back to the base buds. Leave nothing standing dry. Cut everything close to the knot. This looks drastic, but willows tolerate this extremely well.

Summer (July-August): Light thinning. If many thick branches grow, you can now remove side shoots to maintain form.

After pruning: Water well (especially first three weeks). The tree will quickly gather energy and grow many new branches.

Pruning technique step by step

Determine location

Stand before your willow. Establish where your knot lies (usually 2-2.5m high). Draw a mental circle around the knot where all branches emerge.

Inventory all branches

Look how many large branches grow from the knot. For a healthy pollard: usually 5-15 thick branches, depending on size and age.

Cut all branches back

Begin with the thickest branches. Cut them off just above where they emerge from the knot. Use a good saw, not secateurs. Make clean cuts. Leave no stumps.

Check for dead wood

As you cut, search for dead wood (black, grey, hollow). Remove completely.

Leave only the base node

After pruning almost nothing of the branches remains. You see mostly the bare, thick knot with perhaps small stubs where branches emerged. Some call this "bare pruning" and it indeed looks wild, but it is correct.

Why is traditional pollarding so important?

Pollarded willows are not only beautiful, they are also ecologically valuable. In early spring (March-April), before other things bloom, pollarded willows produce many flowers that feed bees and bumblebees. The thin branches that grow are bird-breeding habitat. And it is pure Dutch heritage - pollarded willows were essential to Netherlands history (thin willow branches for basketry, furniture, thatching).

Today, pollarded willows are more decorative and ecologically valuable than practical, but the tradition remains important.

Tools for pollarding

• Pruning saw: For branches up to 5 cm thick
• Hand saw: For very thick wood (above 5 cm)
• Sharp secateurs: For thin new growth
• Long-handled loppers: To cut out of reach
• Safety harness and ladder: Because you work at height

Frequently asked questions

Can I leave my pollarded willow unpruned yearly?

Technically yes, but it will not look nice. After one year without pruning your pollard grows into a messy, unbalanced shape. After two years it is a tangle. Better is annual pruning to maintain form and health.

How long do pollarded willows live?

Pollarded willows can become very old - 100 years or more is not unusual. The knot swelling itself becomes larger and thicker over the years. This is not bad, it gives character. Some monumental pollards are 200-300 years old.

Is it bad for the tree to cut everything back yearly?

No. Willows are very adaptable to regular heavy pruning. It is actually better for their health - this way they do not grow into disease and decline. Pollards pruned well annually are healthier than those neglected.

Can I restore an old neglected pollard?

Yes, but it takes years. Make a plan to bring it back over 3-4 years. Year one: prune less hard. Year two: prune slightly harder. Years three and four: full pruning. This prevents excessive shock to the tree.

What happens to the thick knot with years?

It keeps growing and gets thicker. This is normal. Over time, pollards can develop knots of 1-2 meter diameter. This is beautiful and characteristic.

Step-by-step

Step 1: Establish your pruning plan

For your first pruning, determine at what height you want the knot. Usually 2-2.5 meters. Draw this line mentally or with chalk.

Step 2: Inventory all branches

Look how many large branches emerge from your knot. Count them.

Step 3: Begin with thick branches

Cut the thickest branches first, flush to the knot, with a good saw.

Step 4: Remove dead wood

As you cut, search for and remove dead or damaged wood.

Step 5: Clean thin new growth

Use secateurs to clean thin growth and brush.

Step 6: Step back and evaluate

Look at your work. You should see an almost bare knot with minimal stubs.

Step 7: Water and recovery

Water well after pruning. Feed (fertilize) in April-May.

Frequently asked questions

Which cultivars are best for pollarding?

Salix alba (white willow): The classic pollard. Vigorous grower, very robust.

Salix fragilis (crack willow): Also excellent. Grows slightly faster than alba.

Salix triandra: Smaller, more compact knot. Better for smaller spaces.

Can I prune my pollard differently?

Yes, there are variations. Some regions do "spiral pruning" (not everything back, but in spiral form). Others do "standard form" (strong central leader with side arms). Traditional Dutch is full pruning to the same height, which gives the classic bare knot.

Are pollards protected?

Many are recognized as monuments. Check with your municipality if you plan major changes. Protected trees sometimes may only be pruned by certified arborists.

Discover your own garden design

At [gardenworld.app](https://gardenworld.app) you can upload your front yard and see how a pollard fits - or a normal willow you can later pollard into shape. Plan your monumental garden project before you pick up the saw.