Clematis vines are among the most popular and attractive flowers in the garden. These plants include woody, deciduous vines as well as herbaceous and evergreen varieties.
They also vary greatly among species, with different flowering forms, colors, and blooming seasons, though most bloom sometime between early spring and fall.
While growing clematis successfully depends on the type chosen, most plants share the same basic requirements. Keep reading to learn more about clematis care.
Quick Facts About Clematis Flowers
- Botanical name - Clematis spp.
- Height - 3-12 ft. (0.9-3.6 m)
- Spread - 3-20 ft. (0.9-6 m)
- Sun exposure - Full Sun
- Soil requirements - Neutral
- Hardiness zones - USDA Zones 4-9
- When to plant - Spring, Fall
How to Grow Clematis
There are approximately 300 species of plant in the Clematis genus. Though only a small number of these clematis vines are used in the home landscape, understanding how to grow these beautiful flowers can be confusing. Fortunately, caring for clematis is relatively simple, once growers have a better understanding of each type of plant within their garden.
Sun
Clematis have long been said to prefer their “heads in the sun” and “feet in the shade.” To grow their best, most vines will need at least six hours of sunlight each day. Though some species may prove to be more adaptable than others, making certain that plants receive the proper amount of sunlight will be essential to the production of flowers.
Despite their tolerance for heat, clematis vines may require afternoon shade when grown in warmer regions. In addition to helping to maintain soil moisture, the application of mulch may be especially useful in keeping the plant’s root system cool throughout the summer.
Another easy way to accomplish this is by planting some type of ground cover or shallow-rooted perennial plants around the base of the plants, shielding the roots from the sun.
Water
At planting, clematis should be watered well. Consistent moisture levels will be essential to the development of a healthy, robust root system. Once established, clematis flowers will require at least 1 inch (2.5 cm) of water each week. Keeping a rain gauge in the garden can help to monitor moisture levels in flower beds. While many growers will receive ample rainfall, supplemental irrigation may be required in especially warm regions, or during extended periods of drought.
Soil
Clematis vines prefer well-drained soil that is kept consistently moist. The ideal soil is ever so slightly acidic, with a pH of 6.5 - 7.0.
Fertilizer
Clematis will benefit from the application of a well-balanced fertilizer at planting time. In most instances, the vines will not require additional fertilization. Still, many gardeners may choose to feed their plants annually. This is usually done early in the spring, before the formation of flower buds.
Trellising
Since they're vines, clematis plants require some kind of support to guide their growth. The type of support system is usually dependent on the variety grown. For instance, poles are acceptable choices for smaller growing clematis vines, which can range anywhere from 2 to 5 feet (0.6-1.5 m) in height.
Arbors may be more suitable for growing larger types, which can get 8 to 12 feet (2-4 m). Most varieties of clematis, however, do quite well growing along a trellis or fence.
Pruning
The clematis pruning process can vary greatly from one type of plant to another. Arranged into groups, each clematis in the garden may require a different approach to pruning. Learning more about each variety will be paramount in making certain that growers are able to provide the appropriate care for their clematis vines.
- Group One - Group one consists of clematis that begin blooming in early spring. These vines will produce flower buds on old growth. Pruning of group one clematis should be done in summer, immediately after the plants have ceased blooming.
- Group Two - Many clematis within group two will flower on both new and old wood. It is generally best to prune these vines in late winter or very early spring. At this time, gardeners should remove any stems which have been damaged or have died back during the colder months.
- Group Three - Group three clematis will bloom on new growth. These vines can be pruned aggressively, and allow for gardeners to trim each stem back within several inches of the ground. Growers should expect these clematis to flower throughout summer, often continuing until the arrival of cooler temperatures.
Problems
Clematis are prone to several types of foliar disease. Among the most troubling of these diseases is clematis wilt. Though observant gardeners may notice subtle changes in the appearance of plants, sudden blackening of foliage and stems, followed by collapse of diseased vines, is not uncommon. The prompt removal of infected plants will be key in the control and prevention of the disease.
Other problematic infections within the garden include various types of rot, leaf spot, and powdery mildew, especially in cases of poor air circulation. Fortunately, most of these issues can be controlled by gardeners and seldom lead to the loss of vines.
Pests like aphids and spider mites can be a problem as well.
Clematis Planting Info
Although many clematis vines are grown in containers, they can also be planted in the garden. They are usually planted in fall or early spring, depending on the region and variety.
Clematis plants need plenty of space for adequate air flow as well as a rich, well-draining planting area. You should dig the hole large enough to accommodate the plant, with most recommendations suggesting at least a 2 foot (61 cm.) depth of soil amended with compost prior to planting. It may also help to cut the plant back some before planting to lessen shock as it adapts to its new environment.
Tips for Clematis Care
Once established, care of clematis vines is minimal with the exception of watering. They should be watered about an inch (2.5 cm) or so weekly, and more deeply during dry spells. Mulch should be replenished each spring.
Popular Clematis Varieties
- "Boulevard" Series Clematis
- "Duchess of Edinburgh" Clematis
- "Kilian Donahue" Clematis
- "Nelly Moser" Clematis
-
Grow Limelight Hydrangea Shrubs For Green Themed Displays And Brilliant BordersIf you're a panicle hydrangea lover in search of flamboyant, long-lasting florals, knowing how to grow Limelight hydrangea shrubs will ensure gorgeous green blooms
-
How To Reuse Plastic In Your Garden: 9 Clever Ways To Keep Waste Out Of The LandfillRepurposing is a great way to reuse plastic in the garden. We have gathered some clever ideas about ways to reuse plastic that are helpful for gardeners.
-
Grow Limelight Hydrangea Shrubs For Green Themed Displays And Brilliant Borders
If you're a panicle hydrangea lover in search of flamboyant, long-lasting florals, knowing how to grow Limelight hydrangea shrubs will ensure gorgeous green blooms
-
8 Flowering Shrubs You Must Prune Before Winter Ends For Maximum Blooms This SummerMany summer-flowering shrubs should be trimmed before winter ends, so don’t wait. Get out there on a sunny day and prune your shrubs for more flowers and healthy growth in spring and summer.
-
7 Must-Sow Flower Seeds For February To Ensure A Dazzling Summer GardenDon't let the cold weather stop you from realizing your growing ambitions. These stunning flowers can all be started indoors in winter for breathtaking results.
-
Are Poinsettias Poisonous To Cats? What You Need To Know For Happy, Healthy FelinesThey have the potential to brighten up homes long after the holidays, but are poinsettias poisonous to cats? Make sure you read this before mixing the two!
-
Are Poinsettias Poisonous To Dogs? What You Need To Know To Keep Your Pooch SafeYou may adore their richly hued tones and textures, but are poinsettias poisonous to dogs? Don’t leave it to chance – we reveal how risky they are, and how to keep pets safe
-
Christmas Cactus Watering Guide: How Often To Water Plants For Better BloomsDiscover how often to water a Christmas cactus, how much, and how to avoid under and overwatering for healthy plants that flower reliably over the holidays.
-
Should You Cut Back Roses In The Fall? – When To Prune Your Prized Shrubs For WinterDiscover whether to cut back roses before the onset of winter – or to leave plants alone until spring.
-
Propagating A Thanksgiving Cactus: How To Grow More Plants For FreeEffortlessly propagate your Thanksgiving cactus with simple stem cuttings or root division, to create healthy new plants that burst with vibrant blooms year after year.
