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Regional Picks: Alternatives to Invasives – Mountain West

Fine Gardening - Issue 141

Invasive – Purple Loosestrife

(Lythrum salicaria)



1. Hummingbird Hyssop

Name: Agastache cana

USDA Hardiness Zones: 5 to 9

Size: Up to 3 feet tall and 18 inches wide

Conditions: Full sun; well-drained soil

This tall, xeric perennial adds a deep rose color to the garden in the heat of summer. Spikes of tubular flowers attract many varieties of hummingbirds throughout summer, making this is a must-have plant. Minimal maintenance is required. Do not cut hummingbird hyssop back in fall because leaving the foliage intact for winter allows it to catch leaves and other garden debris for insulation, helping the plant survive.


Invasive – Dame’s Rocket

(Hesperus matronalis)



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