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Clematis Care

6 Steps to Healthy Clematis Plants By Beth Stetenfeld

Clematis plants add height, structure, and elegant beauty to any garden. Though they can be tricky to start, once established they’re easy-care, reliable bloomers. Let’s take a look at six key steps to establishing healthy Clematis plants.

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1. Select The Best Clematis

First, you’ll want to choose a plant that’s right for your garden conditions, location, and preferred bloom time. There are more than 300 species of Clematis and hundreds of hybrids—all of them members of the Ranunculaceae (Buttercup) family. There are early-flowering and late-flowering varieties and small- and large-flowered plants. Some grow as vines, others as small shrubs or trees, and still others as trailing or ground-cover plants.

Consider your garden zone, soil type, nearby plants, and sunlight conditions, as well. Different species and hybrids require different combinations of all these garden elements.

With all these options, selecting the type that’s right for your garden will be perhaps the most important step in adding Clematis to your collection. For example, ‘Jolly Good’ is a vining deciduous variety with plentiful lavender-colored flowers that bloom during the summer. ‘Stand By Me’ is a shrub-forming plant with blue bell-shaped flowers that appear in late spring.

2. Choose The Best Location For Clematis

It’s been said that Clematis plants like “their feet in the shade and their faces in the sun.” Part of the reason is that they need cool, moist (but well-draining) soil for their roots, and enough sunlight to produce blooms. But some Clematis varieties are more shade-tolerant than others. Also, consider the blooming time. If your site is south-facing in a deciduous woodland, a spring-blooming Clematis likely will get plenty of sunlight before the trees leaf out.

A dry site, or one where the Clematis will need to compete for soil moisture, probably isn’t best. On the other hand, too much moisture can encourage slugs or fungal disease, so make sure the location is well-draining.

Consider the surrounding plants: Will your new Clematis complement existing plants and structures in the area? If not, perhaps it’s better suited to a different location.

3. Providing Support For Clematis

If your Clematis is a climbing vine, make sure you have a structure prepared to support it. Clematis vines, depending on the variety, can grow up to 15 feet tall: one example is ‘Sweet Summer Love.’ When fully grown and full of foliage and flowers, the vines can be quite heavy and will need strong support. You’ll want to have the structure ready so it can start climbing as soon as it’s ready!

Climbing Clematis will grow on almost any structure that provides clasping points for the vines to grasp. Chicken wire, a trellis, or fencing materials provide good support. The more contact points, the better—to make sure the vines will be secure during storms and with strong winds.

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If your Clematis will be in a pot, even if it’s more of a shrub form, like Stand by Me Clematis, you might want to have a post or some support, particularly if the conditions are windy, the plant is in partial shade, or it’s placed in a pot. When full of blooms, the plants can become top-heavy.

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4. Protecting Clematis 

Rabbits will eat Clematis. For this reason, and because the plants prefer moist, cool feet, it’s a good idea to place chicken wire, light mesh, or some other light protection around the bottom of the plant. Many gardeners place other plants around the base of the Clematis to achieve this goal. But if you have a rabbit problem, you’ll want to include a more solid barrier like chicken wire.

Make sure to keep the area open enough to allow access for watering during dry, hot weather or if your Clematis is placed under an eave or roofing line. Clematis plants suffer during drought, but, remember, they don’t want soggy feet either, so make sure your soil drains well. If you have naturally heavy or clay soil, amend it with some sand or vermiculite for better drainage.

5. Fertilizing & Watering Clematis

During rainy weather, and if your Clematis plant is in an open area that receives regular (several times per week) rainfall, there’s no need to water it. During a dry spell, water the plant a few times during the week to keep the soil moist. If direct rain is blocked by a roof line or overhang, water your Clematis regularly to maintain soil moisture.

Start with healthy garden soil at the planting site, and fertilize with a light, balanced fertilizer in spring, summer, and fall. If the Clematis shows signs of stress, test the soil around it first to determine any deficiency and the necessary treatment to overcome it. Clematis prefers neutral soil, so adding high-quality compost around the base will help maintain a healthy balance of nutrients.

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6. Pruning Clematis

This is where things can get a little tricky. All Clematis plants benefit from an occasional light (emphasis on light!) pruning. But that’s where the generality ends. Some Clematis varieties bloom only on old wood, some bloom on new growth, and still others bloom on both. Determine which type you have before pruning.

Those that bloom only on old growth need pruning only if they’re overgrown. Be very careful not to prune out all of next year’s blooms! Similarly, those that bloom on both old and new growth generally only need a light pruning each year after blooming. Those that bloom only on new growth can be cut back to about 12 inches in early spring.

Follow these steps, and you’re on your way to lush, healthy Clematis plants that will bloom abundantly for years to come.

  • Select The Best Clematis

  • Choose The Best Location For Clematis

  • Providing Support For Clematis

  • Protecting Clematis 

  • Fertilizing & Watering Clematis

  • Pruning Clematis

When growing clematis, it is important to remember. 

First year they sleep.
Second year they creep.
Third year they leap!