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Growing requirements for Clematis Vines:
Clematis Jackmanii, like any other plant, will thrive if you are able to meet its growing requirements, and give it reasonable care.
Most Clematis require a minimum of 6 hours of full sun per day to grow their best, however some light shading during the hottest part of the day is beneficial.
It is essential for the roots of Clematis to remain cool and moist so protect the root area with a heavy mulch, or the shade of low growing plants or even a large flat rock.
A few of the very large flowered varieties should be planted in a more easternly exposure to prevent excessive flower fading caused by to much sun.
The soil should be well-draining and rich. Clematis like a peaty soil Generous amounts of bone meal and compost should be added to the soil, but should only be cultivated into the top inch or so.