How often should I water clematis?

Water regularly, especially during dry spells, keeping the soil consistently moist but not waterlogged.

What kind of soil does clematis prefer?

They prefer well-drained, humus-rich soil that stays cool and moist around the roots.

When is the best time to prune clematis?

Pruning time depends on the specific type; some are pruned in late winter or early spring, others after flowering.

Can clematis grow in full sun?

Most clematis thrive in full sun to partial shade, but their roots should be kept cool and shaded.

Why are my clematis leaves yellowing?

Yellowing leaves can be caused by overwatering, underwatering, poor drainage, or nutrient deficiencies.

Are clematis vines poisonous to pets?

Yes, clematis can cause gastrointestinal upset and skin irritation in pets if ingested.

Plant guide

Clematis.

Clematis

Pronounced KLEM-uh-tis

Clematis, often called 'The Queen of Climbers,' is a genus of about 300 species in the buttercup family. Native to various temperate regions worldwide, they are prized for their stunning, often abundant, blooms that come in a wide array of colors and shapes. These vines can dramatically transform any garden space, adding vertical interest and vibrant color.

At a glance

Care level: Moderate
Plant type: Perennial vine
Light: Full sun to partial shade (roots shaded, top sunny)
Indoor light: bright-indirect
Water: Every 3 to 7 days
Mature size: Varies greatly by species and cultivar, often 3-10 meters (10-30 ft) tall
Growth rate: fast
Hardiness: USDA 3 to 9
Bloom time: Late spring to early fall, depending on the group

Care

Most clematis thrive with their roots in the cool shade and their tops in the sun. Provide a sturdy support for their twining stems to climb. Regular pruning is essential, but the method depends on the specific clematis group; always research your variety.

Watering: Water thoroughly when the top inch or two of soil feels dry; avoid waterlogged conditions.
Feeding: Feed in spring as growth begins and again after the first flush of blooms using a balanced fertilizer.
Pruning: Pruning group varies by species; consult specific cultivar care to determine best timing and method (winter, spring, or summer).
Repotting: Repot container-grown plants when root-bound, typically every 1-2 years in spring.
Soil: Well-drained, fertile, slightly alkaline to neutral loam
Soil pH: 6.0-7.0
Temperature: -34.4 to 32.2°C
Humidity: 40 to 60%

Safety

People: Clematis contains compounds that can cause gastrointestinal upset, skin irritation, and blistering if ingested or handled without care.
Pets: Can cause gastrointestinal upset if ingested; large amounts may cause skin irritation.
Children: Keep out of reach of children as the plant can cause mild poisoning if ingested, leading to gastrointestinal issues.
Contact allergens: The sap can be a skin irritant for some individuals, causing dermatitis.
Airborne allergens: Pollen from clematis can be a mild respiratory irritant for sensitive people.
Edibility: While some species are reported to have medicinal uses, consuming any part of clematis is not recommended without expert knowledge, as it can be toxic.

How to identify it

Vining habit with twining leaf stalks
Oppositely arranged leaves
Usually large, showy flowers
Four to eight petal-like sepals
Often feathery seed heads
Genus includes many species and cultivars

Height: 3 to 10m
Spread: 0.3 to 1m
Leaves: Green, deciduous
Flowers: Purple, Pink, White, Red, Blue, Yellow, 2 to 20cm

Common problems

Powdery Mildew — A white, dusty coating on leaves and stems, favored by high humidity and poor air circulation.
Leaf Spot — Distinct spots on leaves, often brown or black, which can lead to premature leaf drop.
Aphids — Small, pear-shaped insects that cluster on new growth, sucking sap and potentially spreading disease.
Slugs and Snails — These mollusks can chew holes in leaves and damage young stems, especially in damp conditions.
Vine Borers — Larvae tunnel into stems, causing wilting and death of the vine above the infestation.
Root Rot — Occurs in poorly drained soil, leading to yellowing leaves and eventual plant death.

Growing it

Propagation: Cuttings, Division, Seed
When to plant: Spring, Fall

Plant clematis with companions that provide shade for its roots, as they prefer to stay cool and moist.

Grows well with

Roses — They provide a beautiful contrast in flower form and bloom time, and roses appreciate the shade clematis roots offer.
Dwarf Conifers — Their evergreen structure offers year-round interest and helps keep the clematis root zone cool.
Hostas — Hostas create a lush ground cover that shades the roots of the clematis, which they appreciate.
Shrubby Honeysuckle — Their different growth habits and flowering times create a dynamic display, and they share similar growing needs.

Keep away from

Very Wet Feet — Clematis detests constantly waterlogged soil, which can lead to root rot and plant death.
Gophers — These burrowing rodents can damage or eat the roots of established plants.
Voles — Voles can girdle the base of young plants or eat the roots, especially under mulch or snow cover.

Similar species

Honeysuckle — Both are vigorous climbers that can create stunning displays of flowers, though honeysuckle often has a stronger fragrance.
Wisteria — Both are dramatic flowering vines, but Wisteria is woody and slower to establish, while clematis is typically herbaceous or semi-woody.
Morning Glory — These are fast-growing annual climbers with showy flowers, but clematis is usually a perennial with more varied and long-lasting blooms.

Science

Native range: Worldwide, with major diversity in Asia and North America.
Conservation: Most clematis species are not of conservation concern, but always source plants responsibly.

Clematis species often grow as vines in woodlands, hedgerows, and on rocky slopes, seeking support to reach sunlight.

Value to wildlife: nectar source, larval host plant for some butterflies
Pollinators: bees, butterflies, moths
Uses: ornamental vine, ground cover

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 1/9
Soil reaction: 6/9
Light: 7/9
Temperature: 6/9
Moisture: 5/9
Nutrients: 5/9

Questions people ask

How often should I water clematis?: Water regularly, especially during dry spells, keeping the soil consistently moist but not waterlogged.
What kind of soil does clematis prefer?: They prefer well-drained, humus-rich soil that stays cool and moist around the roots.
When is the best time to prune clematis?: Pruning time depends on the specific type; some are pruned in late winter or early spring, others after flowering.
Can clematis grow in full sun?: Most clematis thrive in full sun to partial shade, but their roots should be kept cool and shaded.
Why are my clematis leaves yellowing?: Yellowing leaves can be caused by overwatering, underwatering, poor drainage, or nutrient deficiencies.
Are clematis vines poisonous to pets?: Yes, clematis can cause gastrointestinal upset and skin irritation in pets if ingested.

Where the name comes from

The genus name 'Clematis' comes from the Greek word 'klematis,' meaning 'a climbing vine.'

Good to know

Clematis belongs to the buttercup family, Ranunculaceae.
There are over 300 species of Clematis, with thousands of cultivars.
Many clematis varieties are deciduous, meaning they lose their leaves in the fall.
The flower shapes range from star-like to bell-shaped and even flat.
Some clematis can live for many decades, becoming quite large specimens.

Is your clematis looking unwell?

This page is a general guide. Pocket Botanist diagnoses problems from a photo of your actual plant, works out watering for your light and conditions, and reminds you when care is due.

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This guide was generated with AI and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.