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Penstemon digitalis 'Huskers Red' (Beard Tongue, Husker Red, Husker's Red)
| Date | Action |
| Mar 21 2009 | Netty (13946) added "6a (to -5 F / -21 C)" to Zones / Hardiness |
| Mar 21 2009 | Netty (13946) added "5b (to -10 F / -23 C)" to Zones / Hardiness |
| Mar 21 2009 | Netty (13946) added "5a (to -15 F / -26 C)" to Zones / Hardiness |
| Mar 21 2009 | Netty (13946) added "4b (to -20 F / -29 C)" to Zones / Hardiness |
| Mar 21 2009 | Netty (13946) added "4a (to -25 F / -32 C)" to Zones / Hardiness |
| Mar 21 2009 | Netty (13946) added "3b (to -30 F / -34 C)" to Zones / Hardiness |
