Clematis care guide: when & how to prune, fertilize and spray
Clematis spp. · USDA zones 4–9
Flowering vines grouped by pruning needs. Group 1 blooms in spring on old wood, Group 2 has large flowers on old and new wood, and Group 3 blooms in summer on new wood. Check your plant tag, or watch when it blooms.
☀️ Sun
Tops in sun, roots in shade. Shade the base with a low plant or stones.
💧 Water
Regular, deep watering.
🪱 Soil
pH 6.5–7.5. Rich, well-drained. Plant 2–3 in (5–8 cm) deeper than in the pot to help it recover from clematis wilt.
How and when to prune clematis
Late-winter prune (Groups 2 and 3)
When: 1–4 weeks before the last spring frost.
- zones 3–5: about Apr 12 – May 3
- zones 6–7: about Mar 18 – Apr 8
- zones 8–10: about Jan 28 – Feb 18
Pruning matches how each group flowers. Getting it wrong costs a year of blooms.
- GROUP 3 (summer bloomers such as 'Jackmanii', sweet autumn and viticella types): cut ALL stems back to 12–18 in (30–45 cm), just above a pair of fat buds.
- GROUP 2 (big flowers in late spring, often again in late summer, e.g. 'Nelly Moser'): only remove dead wood and lightly trim stems back to the highest pair of plump buds.
- GROUP 1 (early spring, e.g. C. montana, C. armandii): don't prune now. Prune right after it flowers.
- Untangle and tie stems onto the support.
Prune Group 1 clematis after flowering
When: 2–5 weeks after the last spring frost.
- zones 3–5: about May 24 – Jun 14
- zones 6–7: about Apr 29 – May 20
- zones 8–10: about Mar 11 – Apr 1
Spring-flowering clematis bloom on last year's wood, so prune only right after flowers fade.
- Trim to tidy and control size only, cutting back to a pair of buds. Skip this if your clematis isn't Group 1.
Fertilizing clematis
Spring feeding
When: from the last spring frost to 3 weeks after.
- zones 3–5: about May 10–31
- zones 6–7: about Apr 15 – May 6
- zones 8–10: about Feb 25 – Mar 18
A single feeding as new shoots emerge is enough for most perennials. Overfeeding makes them floppy.
- Scatter a balanced slow-release or organic fertilizer around the plant, or top-dress with 1 in (2–3 cm) of compost, then water.
What to use: 🌿 Balanced organic granular fertilizer (e.g. Espoma Plant-tone 5-3-3) · 🌿 Organic rose food (e.g. Espoma Rose-tone 4-3-2)
Soil, compost & mulch for clematis
Refresh mulch
When: 2–6 weeks after the last spring frost.
- zones 3–5: about May 24 – Jun 21
- zones 6–7: about Apr 29 – May 27
- zones 8–10: about Mar 11 – Apr 8
Mulch keeps roots cool and moist, suppresses weeds and slowly feeds the soil. Applying it after the soil warms lets roots wake up first.
- Spread 2–3 in (5–7 cm) of mulch over the root zone.
- Keep mulch 2–3 in (5–7 cm) away from stems and trunks. Mulch piled against bark invites rot and rodents.
- Don't go deeper than 3 in (7 cm) in total. Too much mulch suffocates roots.
What to use: 🌿 Shredded hardwood or pine bark mulch
Common clematis problems and how to fix them
Clematis wilt
Signs: Stems suddenly collapse and blacken.
What to do: Cut affected stems to the ground. Deep-planted clematis usually regrows from below the soil.
Clematis care FAQ
When should I prune clematis?
Late-winter prune (Groups 2 and 3): 1–4 weeks before the last spring frost (around Mar 18 – Apr 8 in zones 6–7). Prune Group 1 clematis after flowering: 2–5 weeks after the last spring frost (around Apr 29 – May 20 in zones 6–7). Flowering vines grouped by pruning needs. Group 1 blooms in spring on old wood, Group 2 has large flowers on old and new wood, and Group 3 blooms in summer on new wood. Check your plant tag, or watch when it blooms.
What is the best fertilizer for clematis?
A single feeding as new shoots emerge is enough for most perennials. Overfeeding makes them floppy. Good options: Balanced organic granular fertilizer (e.g. Espoma Plant-tone 5-3-3); Organic rose food (e.g. Espoma Rose-tone 4-3-2).
What soil does clematis need?
Rich, well-drained. Preferred pH 6.5–7.5. Plant 2–3 in (5–8 cm) deeper than in the pot to help it recover from clematis wilt.
How much sun and water does clematis need?
Sun: Tops in sun, roots in shade. Shade the base with a low plant or stones. Water: Regular, deep watering.
What are common clematis problems?
Clematis wilt: Stems suddenly collapse and blacken. Cut affected stems to the ground. Deep-planted clematis usually regrows from below the soil.
More vines care guides
Timings are given relative to your average frost dates, with examples for typical US climates. Always read and follow product labels.