Hydrangea macropnyiia ana Hydrangea serrata mats at the university of Kentucky

摘要

During the last decade, Hydrangea macrophylla has enjoyed a resurgence as a dominaate landscape plant. Selection and hybridization has yielded many new cul-tivars. During the late 1990s we concluded little was known about the usefulness of the wide range of cultivars for establishment in landscapes in the Ohio River Valley-^sStarting in 2000, we have established several evaluation plots at three locations (Table 1) across Kentucky as material of landscape size (No. 1 container) hecame available for use Cultivars established after 2000 have six replications at each site. Specific cultivars have been established at one, two, or three sites. Data is inceluded for cultivars at multiple sites. We have now evaluated over 100 cultivars. Plants have been evaluated for winter hardiness and ability to flower. Quicksand and Lexington sites are on drip irrigation while the Paducah site is hand watered an as-needed basis. All three sites are in USDA Hardiness Zone 6.