Determining cold hardiness of Heuchera sanguinea Engelm. 'Chatterbox' using dormant crowns
1993
Iles, J.K. | Agnew, N.H.
Dormant, intact crowns were used to determine the cold hardiness of the herbaceous perennial Heuchera sanguinea 'Chatterbox'. Crowns were placed in moist cheesecloth, wrapped in aluminum foil, and subjected to -4,-6,-8,-10,-12,-14,-16, or -18C in a programmable freezer. Regrowth quality ratings and dry-mass measurements decreased linearly with temperature. No regrowth was evident from any crown exposed to -12C or lower temperatures. Freezing dormant plant crowns proved an efficient and reliable technique for estimating cold hardiness of Heuchera 'Chatterbox'.
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