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Campanulastrum americanum
| Date | Action |
| Nov 24 2008 | Netty (13946) added "4b (to -20 F / -29 C)" to Zones / Hardiness |
| Nov 24 2008 | Netty (13946) added "5a (to -15 F / -26 C)" to Zones / Hardiness |
| Nov 24 2008 | Netty (13946) added "5b (to -10 F / -23 C)" to Zones / Hardiness |
| Nov 24 2008 | Netty (13946) added "Biennial" to Plant Types |
