Linaria canadensis is an annual/Biennial found in areas such as N. America - Nova Scotia to Florida, west to Minnesota, Oregon, Texas and California. A member of the Scrophulariaceae family, Linaria canadensis (L.)Dum.Cours is also known by its common name of Blue Toadflax. The Annual/Biennial can grow to a height of 0.6 meters and up to meters wide. The preferred habitat of Dry sterile or sandy soils, often a weed in sandy loams[43]., with LM soil and N moisture levels. .

Blue Toadflax is a zone 4 hardy plant that has medicinal uses - the medicinal usage rating of Blue Toadflax is 1The leaves are antihaemorrhoidal, diuretic and laxative[61, 254]. They are applied externally in the treatment of haemorrhoids[254].

Linaria canadensis is a non flowering plant which is pollinated by .

Cultivation tips: A very drought resistant plant once established, it thrives in a poor gravelly soil[200]. Nitrogen-rich soils produce excessive leaf growth at the expense of flowering[200]. The plant prefers a sunny position[200].

. The plant should best be propagated by Seed - sow spring in situ[200]. An autumn sowing can also be made in areas with mild winters[200]. This sowing will produce larger plants.