How to prune clematis group 2: two blooms per season

Why prune group 2 differently from group 1?

Clematis group 2 (large-flowered cultivars) are the "easy" clematis. They flower TWICE per season: a first bloom in May-June on last year's wood, then again in August-September on this year's growth. This means you can prune more boldly than group 1, but less severely than group 3.

The characteristic large flowers (7-12 cm across) of cultivars like 'Henryi', 'Jackmanii', 'Nelly Moser', 'The President' all belong to group 2. They are semi-remontant: first on old wood, then on new. The pruning strategy is: light pruning in spring, clearer pruning after first bloom.

Without proper pruning, group 2 becomes a tangle of dead shoots, blooms thinly, and suffers frost damage. With two pruning moments per season, your plant stays neat, healthy, and full of flowers.

Group 2 pruning schedule: two moments

Moment 1: Early spring (February-March)

This is cautious pruning. Your goal is to clean, not form hard. What you do:

• Remove dead wood: Cut all brown, dry, black shoots back to healthy green. Priority.
• Remove weak thin shoots: Shoots thinner than a pencil, twisted or drooping, have no future.
• Cut back to healthy buds: Prune each shoot back to the FIRST PAIR OF HEALTHY, PLUMP leaf buds. This stimulates two new shoots from that bud.

Make sure you do NOT prune too hard. Group 2 flowers on last year's wood, so caution needed. You don't have the safety of group 3, but removing shoots means less bloom in May-June.

Moment 2: After first bloom (July)

After May-June blooming, the second pruning for group 2 is crucial:

• Remove faded flowers, including the lower 30-50 cm of the flowering shoot. This contains seed-setting, which consumes energy.
• The plant now invests in growth. This new shoot will bloom AGAIN in August-September.

In this pruning you may be more generous. You are cutting fresh growth of this season, so risk is lower.

Step by step spring (February-March)

Step 1: Inspect the whole plant

Walk through your group 2 clematis. Which shoots are dead (brown, black)? Which are green and strong? Note mentally.

Step 2: Remove dead wood

All brown, dry, dead shoots come off back to healthy green. Do not cut deeper than needed. Use clean, sharp secateurs.

Step 3: Remove thin shoots

Pencil-thick shoots with no plump buds? Remove. These are usually low, drooping, or twisted.

Step 4: Cut back to healthy buds

This is the key step. For each healthy shoot, cut back to the FIRST PAIR OF HEALTHY, PLUMP LEAF BUDS. These may be 60-120 cm from ground. Cut just above a bud. This forces two new shoots per bud - more flowers.

Step 5: Tidy up

Remove loose bark, last year's dried leaves still clinging, and tangled low shoots. Make the plant look neat.

Step by step summer (July)

Step 1: Wait for bloom to finish

Your group 2 blooms May-June. By early July you check: are most large flowers done? Begin summer pruning.

Step 2: Remove faded flowers

Cut off each spent flower, INCLUDING the lower 20-30 cm of the flowering shoot. This is where seed-setting happens (heavy energy cost).

Step 3: Remove dead wood (this season)

Much dead after bloom? Remove. Should not be much if you cleaned well in March.

Step 4: Light thinning

Check the plant is not too dense. Is it a tangled knot of shoots? Remove a few old, grey canes so air and light penetrate.

Step 5: Water and feed

After summer pruning: add compost around the roots and water well. The plant will now make new growth for August bloom. Nutrition helps.

Common group 2 cultivars

'Henryi': Very large white flowers. Vigorous growth. After March pruning grows fast. Summer prune boldly (30-50 cm back) because it regrows fast.

'Nelly Moser': Pink with red stripe. Moderate growth. Gentler spring pruning, light summer. Too hard and you get leaves, few flowers.

'The President': Very large dark purple. Sparse grower. Minimal pruning. Mainly remove dead wood. Summer prune cautiously, not hard back.

'Jackmanii': Classic dark purple-blue, large flowers. Grows well. Can tolerate firmer pruning than 'Nelly'. Both times (March + July) you can work harder.

'Hagley Hybrid': Pink-red, purple centre. Moderate grower. Cautious pruning. More maintenance than training.

What goes wrong: common mistakes

Mistake 1: Confusing group 2 with group 3. You prune group 3 hard back to 50 cm and wonder why group 2 does not bloom in May? They are DIFFERENT. Group 2 flowers on last year's wood. Prune cautiously.

Mistake 2: No summer pruning. If you only cut in March and not July, you get bloom only May-June. July pruning equals second bloom in August. That is group 2's advantage!

Mistake 3: Too hard March pruning. Many gardeners prune group 2 like group 3, back to 50 cm above ground. This destroys May bloom. Prune cautiously back to first healthy bud.

Mistake 4: Forgetting it grows large. 'Henryi' grows 3-4 metres per season after a few years. If you don't prune and thin regularly, it becomes unmanageable.

Frequently asked questions

What if my group 2 does not bloom in May?

Probably pruned too hard in March, or last year no growth was made. Leave it this year. Apply July pruning and you should see August. Next year prune March more gently.

Another cause: severe frost damage last winter. Then much dead wood. Will not bloom this season. Recovery 2026.

Can I prune group 2 in October?

Better not. October pruning can introduce frost damage. Group 2 actually blooms through October-November. Let bloom happen. Wait until March.

My group 2 has one huge shoot dominating everything, can I tame it?

Yes. In March you can cut this dominant shoot hard back (to 50-60 cm) to balance. The side shoots on this cane will not grow hard (they are attached) but will bloom in May. Acceptable compromise.

Does group 2 also prune to ground level like group 3?

In emergencies yes, but not ideal. Group 2 can be cut to ground (like group 3), but you lose May-June bloom. Only do if Wilt or extreme frost damage.

Step-by-step

Step 1: March pruning preparation

Begin February-March. Inspect whole plant. Note dead wood.

Step 2: Remove dead wood

All brown/dry shoots off back to healthy green. Use clean secateurs.

Step 3: Cut back to buds

Prune each shoot back to first pair of healthy, plump leaf buds. 60-120 cm high.

Step 4: Remove thin shoots

Pencil-thick, twisted, drooping? Remove.

Step 5: July pruning preparation

After May-June bloom. Remove faded flowers plus 30-50 cm of shoot.

Step 6: Water and feed July

Compost around roots. Water well. Trigger August bloom.

Discover your own garden design

At [gardenworld.app](https://gardenworld.app) you can upload your front yard and see how different group 2 clematis cultivars look against walls and pergolas. Choose 'Henryi' for vigorous growth, 'Nelly Moser' for cautious growth, and see both blooming periods. Plant them side-by-side to compare and visualise your own design on [gardenworld.app](https://gardenworld.app).