Troubleshooting
Clematis 'Henryi' problems — and how to fix them
Clematis 'Henryi' (Clematis 'Henryi') is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Wrong-time pruning
Being Group 2 it flowers partly on old wood, so hard pruning sacrifices the big early flush. Prune lightly in late winter, removing only dead and weak stems.
Clematis wilt
Large-flowered hybrids such as 'Henryi' are prone to sudden wilt. Plant deep so buds below soil can regrow, and cut wilted stems back to healthy tissue.
Sun-scorched blooms
The large white flowers can scorch and discolour in fierce direct sun. A position with light shade in the hottest part of the day keeps them clean.
Powdery mildew
Late-season mildew appears in humid, still air. Improve ventilation, water at the base, and remove affected foliage to limit spread.
Prevent clematis 'henryi' problems before they start
Most clematis 'henryi' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for the species overview? Clematis — the full care guide.
Clematis 'Henryi' problems — FAQ
Why is my clematis 'henryi' wrong-time pruning?
Being Group 2 it flowers partly on old wood, so hard pruning sacrifices the big early flush. Prune lightly in late winter, removing only dead and weak stems.
Why is my clematis 'henryi' clematis wilt?
Large-flowered hybrids such as 'Henryi' are prone to sudden wilt. Plant deep so buds below soil can regrow, and cut wilted stems back to healthy tissue.
Why is my clematis 'henryi' sun-scorched blooms?
The large white flowers can scorch and discolour in fierce direct sun. A position with light shade in the hottest part of the day keeps them clean.
Why is my clematis 'henryi' powdery mildew?
Late-season mildew appears in humid, still air. Improve ventilation, water at the base, and remove affected foliage to limit spread.