Plants grow 3 to 4.5 feet tall, bloom in mid to late summer and early fall if started that year of cut back after their first flush of flowering. Can be used to make a scented potpourri. Of all the different Agastache that I have grown -- this selection produces, to me, the best scents, which are on the more sweet' side, instead of the 'pungent.' Plants grow 30-40 inches tall with strongly upright stems and bloom for an extended time in summer and fall. Great plants for growing in sun or half shade. I like the nice upright form of these plants. Good cut flowers too. Easy and blooms the first year, best color when the it cool out, so a good choice for sowing in early summer for late summer and fall blooming. This selection is very hardy and has grown for me many years in my zone four garden.
Most plants come in shades of blue from soft blue to dark blue with a few other colors once in a while. Plants do well on most any soil including heavy clay. Plants are drought tolerant. The multi-stemmed clumps produce good cutting material and dead heading produces another flush of blooms all along the stems. Plants self seed around but not to the point of becoming weedy. They look nice coming up in amongst our Hosta and stray plants are easy to pull out of the ground when only a year or two old. Pinch back the top of the plant in early July to promote a more compact habit and heavy branching.
Lightly cover seeds, with germination in 5-15 days at F 70. The flowers are a darker blue in the fall when the air temperature is cooler.