Varieties for the Midwest:

Meet the phenomenal plants that have proved to survive through Iowa’s unique climate at the Iowa Arboretum & Gardens Trial Program. Top Performers are the best of the best; selected by a committee of researchers specifically for their outstanding performance in lowa. Winning plant varieties are recommended as the best plants available for central Midwest gardeners, proving to be hardy, beautiful, and easy to grow.

Perennial varieties must survive at least 3 growing seasons and two winters, while shrubs must survive 5 growing seasons and 4 winters. The varieties may prove to be hardy, but they must also look good all season long and have an impressive, long-lasting floral display. Plants up for consideration to be awarded Top Performer must be readily available from wholesalers.