Outsidepride Agastache Heather Queen - 100 Seeds Agastache Heather Queen is a perennial that grows best in USDA Zones: 6 - 10. Due to Agastache Cana's aromatic foliage it is a great plant for attracting both hummingbirds and butterflies. This very heat and drought tolerant dark pink heirloom flower is easy to establish and should be sown at 3 -4 seeds per plant. Sow Heather Queen flower seeds in full sun and in a rich, well-drained, soil. Keep seeds moist until germination. Our seeds are always Non-GMO and packaged for the current year.