Tanacetum vulgare - Tansy

Tanacetum vulgare grows 2' tall and slowly spreads to 2 feet or more, the foliage maxes out at about a foot and the flowers stand well above. Tansy forms a slowing spreading clump, stems root as they go. The yellow flowers bloom Winter into Spring. The dried flowers are sometimes used as an ant repellant, I have tried this idea out by using Tanacetum vulgare as a companion plant in orchards and it seems somewhat effecive. Tansy is not particular about soils but will not make it when the soil regularly becomes soggy. Tansy is quite drought tolerant and does its best in a full sun planting.Tanacetum vulgare has survived Winter temperatures the low to mid teens, and likely capable of surviving more difficult extremes.