![Clematis 'Jackmani Superba' | Photo by Frank Vincentz (Own work) [GFDL or CC-BY-SA-3.0], via Wikimedia Commons](https://wyomingplantcompany.com/wp-content/uploads/2017/12/Clematis-jackmani-superba-frank-vincentz.jpg "Clematis 'Jackmani Superba' | Photo by Frank Vincentz (Own work) [GFDL or CC-BY-SA-3.0], via Wikimedia Commons")
Jackman Superba Clematis
Clematis ‘Jackmanii Superba’
Plant size: #1
12 feet high x 3 feet wide
Zone 2
Sun to Shade
Out of stock
An improved Jackman clematis with profuse, bigger, rounded, dark violet blooms throughout summer! In early spring cut back last year’s growth to about a foot from the ground as it blooms on new wood.
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Throughout this site, the following are used as guidelines for watering established plants:
These truly xeric plants can live with our 12 inches of natural annual precipitation and only need a winter watering during a multi-year drought, but they will thrive with a monthly watering. Overwatering will kill some of these. These plants are adapted to intermittent deep
watering with soil drying to a depth of a few inches between waterings. Watering frequency may be every couple of weeks during the active growing season and maybe only one winter watering for optimal care. These plants need regular watering somewhat like a bluegrass lawn so that
they never dry to depth in the root system during the active growing season, and need occasional winter watering to prevent root dessication and resultant plant
death. About sizes of our plants:
Sizes indicated with a # are roughly the equivalent in gallonage; so a #2 is about a 2 gallon pot size; b&b stands for balled and burlapped.