Duchess of Edinburgh Clematis
Duchess of Edinburgh Clematis
Fully Double, Rosette-Like White Blooms on a Classic Climber
Duchess of Edinburgh Clematis (Clematis 'Duchess of Edinburgh') is a treasured heirloom prized for its fully double, pure-white flowers that open like layered rosettes — almost gardenia-like — in late spring and early summer. It climbs trellises and arbors on a zone 4-hardy vine and, like all clematis, wants its top in the sun and roots in cool shade. Whether you're brightening a shaded entry in Edina, climbing a white-trimmed arbor in Maple Grove, or adding an elegant note to a Woodbury garden — the Duchess brings timeless white to zone 4b–5a yards.
Duchess of Edinburgh Clematis Plant Details
| Attribute | Detail |
|---|---|
| Scientific Name | Clematis 'Duchess of Edinburgh' |
| Plant Type | Deciduous flowering climbing vine |
| Mature Height | 6–10 feet (with support) |
| Mature Spread | 3 feet |
| Sun | Full sun to part shade (6+ hours for best bloom); keep the roots cool and shaded |
| Water | Moderate — consistent moisture in well-draining soil |
| USDA Zones | 4–9 (Twin Cities is zone 4b–5a) |
| Soil | Rich, well-draining; amend Minnesota clay-loam with compost |
| Pruning Group | Group 2 — light prune in early spring; the double flowers form on old wood |
| Bloom | Fully double white flowers in late spring/early summer; single white rebloom possible later |
| Winter Hardiness | Reliable to zone 4; mulch the crown the first winter |
Duchess of Edinburgh Clematis Uses in Minnesota Landscapes
Arbors and trellises
The double white blooms glow against dark fences and evergreens. Climb it up an arbor or lattice in a Plymouth garden where you can admire the rosette flowers up close.
Moon and white gardens
Pure-white doubles are made for an evening or white-themed garden, lighting up at dusk in Eden Prairie.
Cut flowers
The double rosettes are long-lasting and elegant in arrangements.
Best Time to Plant Duchess of Edinburgh Clematis in Minnesota
Spring (late April–May) and early fall (late August–September) are both excellent. Avoid summer heat, and never plant after mid-October — frost-heaving kills new roots.
How to Plant Duchess of Edinburgh Clematis
- Site it so the top gets sun but the roots stay cool and shaded — "head in the sun, feet in the shade." A bit of afternoon shade keeps the white clean.
- Dig 2–3× the root ball width and set the plant 2–3 inches deeper than it grew in the pot to guard against clematis wilt.
- Backfill with native soil plus 20–30% compost; firm gently and water in well.
- Install the support at planting and tie young stems to start them climbing.
- Mulch 2–3 inches over the root zone or shade the base with a low perennial; keep mulch off the stems.
Watering Duchess of Edinburgh Clematis in Minnesota
First Year Watering Schedule
- Weeks 1–2: Every 2–3 days, deep and slow
- Month 1–2: Every 3–4 days
- Month 3–6: Weekly; keep evenly moist but never waterlogged
- Stop watering 2–3 weeks before ground freeze (typically late October in the Twin Cities).
After Year One
Water deeply during dry spells, especially in summer heat. Steady moisture with good drainage keeps it healthy.
Why are some flowers single instead of double?
The fully double rosettes form on old (last year's) wood. Any later flush on new wood may be single — that's completely normal for double clematis.
How do I prune the Duchess?
As a Group 2 clematis, prune lightly in early spring — remove only dead or weak stems. Hard pruning sacrifices the double blooms.
Will it survive a Minnesota winter?
Yes — hardy to zone 4. Mulch the crown the first winter or two; established plants need no protection.
You May Also Like
- Henryi Clematis — large single pure-white flowers
- Blue Light Clematis — fully double powder-blue blooms
- Proteus Clematis — double mauve-pink flowers