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Clematis Diamantina™

Clematis Diamantina™

Clematis 'EVIpo39' PP#20,638

Plant Patent 20,638. Cultivar name: 'EVIpo39'

One of the most spectacular Raymond Evison introductions yet, Diamantina™ stole the honors (and the admiring stares!) at the 2010 Chelsea Flower Show, and we are delighted to make it available to you here now. This is a double-flowered Clematis, with blooms up to 6 inches wide, that flowers very heavily in early season, then repeats more modestly in summer and fall. The flowers seem to last forever, and the plant is compact enough for containers. Need we say more?!

These sparkling blue blooms are very fully double, with a central pompon of lighter lilac (often striped) surrounded by layers and layers of rich plummy violet petals. To say that these 4- to 6-inch flowers are striking is an understatement -- they simply pop! And they remain fresh and vibrant for an astonishing 4 weeks, something few other Clematis can boast.

Diamantina™ is a compact climber, just 8 to 10 feet high and 3 to 4 feet wide in the garden, somewhat smaller in containers. It is a sport of 'Crystal Fountain,' and anyone familiar with that exciting Evison introduction will see the evolution of color and form in Diamantina.™ Both are part of Evison's Regal® Collection of double-flowered Clematis cultivars.

Whether you choose to grow this climber in the garden or a container, select a sunny spot and give it a season or two to find its feet. A splendid companion to roses, it is also a breathtaking addition to the mailbox, lamppost, or other natural vertical structure. Select only the best for your garden -- grow Diamantina™ this season! Pruning Group II. Zones 4-9.

The Big-Flowered Summer Bloomers

Masses of frilly star-shaped blooms; big white snowflakes that blanket the garden twice a season; true-blue color for 4 solid months. The big-flowered, double, and otherwise showy Clematis varieties are among the very best for the garden, and you can master the annual pruning technique in about 3 minutes. First, make sure you've already done the special first- and second-year pruning. Then just maintain your Clematis's beauty as follows:

Group 2 Clematis blooms on "old wood," which simply means stems that grew last season or earlier. (This season's new stems — the ones that grow from spring till the summer bloom season begins — won't flower until next year.) Therefore, you don't want to prune too radically. The rule of thumb is that in late winter or earliest spring, cut back each stem about 6 to 8 inches, to right above the point where it branches. At this branching point, you should see a pair of little bumps. These are buds, and you want to keep them. Find all the branching stems on the Clematis and trim to just above those buds. (You may have read in gardening manuals: "Trim to a pair of strong buds." That's what this process is — the two buds right above the place where each stem branches are the "pair of strong buds" you're looking for! They're easy to see on the slender Clematis stems.)

Once you know your Clematis's pruning number and get that first-year trim out of the way, keeping this woody climber looking its best and blooming like crazy is simple! A few minutes once a year will yield you armloads of flowers for many seasons, and you will continue to find new uses for Clematis, from hiding an unsightly fence to decorating your most formal garden art!

Shop Clematis Time to Prune? Group 1 Group 3