How to prune Reine Claude plum trees: a guide to perfect form

The Reine Claude: why good pruning is essential

The Reine Claude (Prunus domestica var. claudiana) is a rare delicacy. This French heirloom plum with its amber-gold colour, fine sweetness and almost melting flesh is the difference between an ordinary fruit tree and a royal experience. But without proper pruning, the tree grows chaotically, harvest energy goes into twigs instead of fruit, and a dark tangle develops where disease thrives.

Reine Claude naturally grows relatively compact - to 500-600 cm - with a semi-open shrub-like form. Good pruning maintains that shape, ensures enough light in the canopy, and directs energy to fruit-bearing branches. This is a frost-sensitive variety (hardy to at least -15 degrees Celsius), so careful winter pruning is crucial.

What makes Reine Claude different from other plums

Reine Claude is more sensitive to saw wounds than robust varieties like Monarkh or Anna Spaeth. The tree recovers more slowly from aggressive pruning, especially in harsh winters. You must work carefully, avoid large wounds, and get the timing right.

Moreover, Reine Claude bears mostly on longer branches - not on short spurs. This means that unlike apples, you can't simply leave short spurs behind. Instead, you focus on maintaining balanced, strong scaffold branches and selectively shortening growth.

Winter pruning: February-March (dormant season)

Timing: Prune after the worst frosts have passed (mid-March in Belgium and Netherlands) but before bud-break. Reine Claude is frost-sensitive, so avoid pruning December-January.

Goal: Build the framework, remove dead wood, clear crossings, and open the tree to light.

Method:

1. First remove all dead, twisted or diseased wood - this is non-negotiable.
2. Remove branches that cross or rub against each other. Always choose the strongest branch and remove the other completely.
3. Side shoots that hang downward or grow directly against the stem are pruned to 20-30 cm, at a slant.
4. The central leader (if present) is carefully shortened by 20-30%, no more.
5. Side branches on the framework can be pruned to 40-50 cm if they become too long, but don't leave them bare - leave 3-4 buds above each cut.

All saw cuts start with an undercut - saw from below to above, then on top slightly further. This prevents bark-tearing.

Green pruning: July-August (growing season)

In July-August (growing season, but momentum declining) you can selectively thin without excessive wounding. This is ideal for Reine Claude.

Goal: Redirect very strong-growing shoots, remove overlap, allow slightly more light.

Method:

• Very vigorous, long waterspouts (> 80 cm in one season) are halved.
• Shoots growing close together, remove one.
• Small side shoots growing inward are pinched off or pruned short.
• Never remove more than 15-20% of the leaf canopy - you don't want shock.

Form maintenance: year after year

Create a clear mental picture of how you want the tree to grow: open shrub (about 4-5 scaffold branches), or more semi-open spirals? Reine Claude suits both, but choose one and stick with that form.

Each year:

• Check the scaffold branches - do they need to grow stronger or weaker?
• Side shoots on scaffold branches: prune to 40 cm (or remove entirely if they grow poorly).
• Side branches on those shoots: to 15-20 cm.

This system is slightly stricter than with apple, because Reine Claude doesn't form strong spurs.

Step-by-step plan for winter pruning Reine Claude

Step 1: Preparation and observation

Place the tree in full light. Observe the growth direction of all branches. Mentally mark (or with ribbon) which branches you want to keep as framework - typically 4-5 main branches at 45-60 degrees from the stem.

Step 2: Dead and diseased wood

Prune out all dead (grey, brittle wood), fungal or damaged. Saw flush to the branch collar (the ring-shaped indentation where branch meets stem). Leave no snags.

Step 3: Crossings and rubbing branches

Follow each scaffold branch curve. Where two branches cross or grow close together, prune the weakest or least important one entirely (to the insertion point, not halfway).

Step 4: Shortening vigorously growing branches

Shorten extremely long shoots on scaffold branches. Work at a slant (45 degrees) so water runs off. Leave 3-4 buds above each pruning point.

Step 5: Tidy up side shoots

Small, weak, or downward-growing side branches on the framework can be removed entirely or pruned to 20-30 cm.

Step 6: Finishing

Leave no stubs. All saw cuts < 5 mm heal naturally. Larger cuts can carefully (very lightly) be covered with tree sealant - but this is not always necessary. Reine Claude recovers reasonably quickly from clean saw wounds.

Frequently asked questions

Can I prune in November?

No. Reine Claude is frost-sensitive - pruning wounds in November-December freeze shut before they can heal, letting in rot. Wait until mid-March, after the frost.

How hard can you prune a Reine Claude?

Never more than 30% of total branch surface. Reine Claude is sensitive to over-pruning and will have less growing power. Work carefully and gradually over several years.

When do fruits begin to form?

Reine Claude usually bears from year 3-4 after planting. But full production (5-10 kg per tree) is reached around year 6-8. Pruning to encourage earlier bearing: no - you want a strong tree first.

How do I recognise diseased branches?

Look for brown-red patches in the bark, gummy ooze (gummosis), or white-grey powder (mildew). Prune these branches well back into healthy wood - you'll see this by the bright green or red bark.

Can I save an overgrown Reine Claude?

Yes, but over 2-3 years. Never prune more than 30-40% per year. Year 1: dead wood plus worst crossings. Year 2: frame the form. Year 3: refinement. Too aggressive pruning leads to massive gummosis and die-back.

Valuable tips for top harvests

Thinning fruit: Reine Claude can overbear. When fruits are hazelnut-sized (May-June), thin to 1 fruit per 10-15 cm twig. This seems harsh, but you'll get larger, sweeter fruits and prevent branch breaking.

Watering and feeding: A good pruning result is pointless without good growing conditions. In dry summers water regularly (20-30 litres per tree, 2x per week). In April give compost - no artificial fertiliser.

Support: Heavily loaded branches can snap under their own weight. Place wooden supports or use branch props (branches bent together) to distribute the load.

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With the right pruning and a bit of patience, your Reine Claude grows into a low, wide, very productive tree full of amber-golden fruit. The effort is worth it - this plum is pure luxury. And each season you learn more, become more skilled at pruning, and the tree gains more character.

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