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This exciting vertical accent plant with very fine soft bright green feathery leaves stumps even some plant nerds. Herbaceous, to 6' tall, with insignificant white flowers, it's about the feathery foliage, which, by the way, turns reddish in fall. The form is extremely tall and narrow (sometimes gravity must be defied for a little excitement); a perennial curiosity. This is a selected sterile form that won't invade; clumping to 3' wide. While it can take a lot of sun, afternoon sun for very long may challenge it.
Minimum temperature: 0° F
The second photo (showing the beginning of fall color): By Don McCulley - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=73758134