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Clematis 'Ernest Markham'
| Date | Action |
| Jul 14 2009 | TheBip (172) added "4b (to -20 F / -29 C)" to Zones / Hardiness |
| Jul 14 2009 | TheBip (172) added "4a (to -25 F / -32 C)" to Zones / Hardiness |
| Jul 14 2009 | TheBip (172) added "10 to 20 feet (3 to 6 m)" to Height (Maximum) |
