Agastache is a perennial herb that is a member of the mint family. They can grow to be 3 feet tall and 2 1/2 feet wide. Agastache attracts butterflies, bees and hummingbirds and emit a sweet fragrance. Their blooms come in a variety of colors including lavender and pink. Agastache is planted in USDA zones 5 to 9, and to help maintain it as perennial, you should not cut off the foliage until after winter.
Choose a sunny location to plant your agastache. In colder zones that have wet winters, plant agastache in an area with maximum sun exposure, such as on a south or west facing slope. This will help keep them warm and help with water drainage.
Turn over the top 12 inches of your soil and mix in several inches of sand so that it drains well. This will also create a raised bed, which helps with water drainage.
Dig holes for your agastache that are just as deep as its current container, but twice as wide. Space multiple agastache 2 feet apart.
Take the agastache out of its container and place it in the hole. Backfill the soil and tamp it down to get rid of all the air pockets.
Water the plant well and cover the planting site with 2 inches of course sand or fine gravel mulch. This will help keep the plants warm during the winter months and help them retain water.