what is the best temperatures for yarrow?
describe please humidity of yarrow
Certified GKH Gardening Expert
This plant grows in USDA zones 3-9, and is not particular about the humidity levels. This plant grows so easily that it is classified as invasive in many areas.
This article will give you more information on the plant: https://www.gardeningknowhow.com/edible/herbs/yarrow/growing-yarrow.htm