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Toadflax (Common/Yellow) is a perennial that spreads by seed and creeping roots.

Perennial weeds grow from root stalks year after year.  Perennial weeds spread by seeds and roots, and therefore the entire plant must be destroyed.

Classification:  Noxious Weed

Recognizable features:

Stem:  Often several stems forming dense patches, unbranched to few branches in upper stem, hairless, up to 1 meter tall

Leaves:  Alternate to spirally arranged, numerous, attached directly to the stem, hairless, margins smooth or entire, linear, up to 10 cm long

Flowers:  Resemble Snapdragon, bright yellow with yellow-orange throat, up to 3.5 cm long including the spur extending from the base, alternately arranged along terminal ends of stems

Distinguishing Toadflax (Common/Yellow) from Leafy Spurge and Dalmatian Toadflax

Toadflax is commonly confused with Leafy Spurge when flowers are absent.  However, Yellow Toadflax is easily distinguished by the absence of milky juice in the plant.  Also confused with Dalmatian Toadlflax, but easily distinguished by the presence of long linear leaves compared to the short broad leaves of Dalmatian Toadflax.

For more information on Dalmatian Toadflax and Leafy Surge, check out these fact sheets issued by the Alberta Invasive Species Council at

Green Oasis offers a variety of weed control services to help you get rid of those pesky weeds including 3 lawn care packages.

Contact your local office to learn more:

Calgary:                                                                Red Deer:

Tel:  403-206-9900                                             Tel:   403-358-3339


Information compliments of Agricultural Industry, AAA Fieldmen, Environment, Health & Safety Handbook.

For more information on Toadflax (Common/Yellow), check out this fact sheet issued by the Alberta Invasive Species Council at – Toadflax (Common/Yellow) Fact Sheet.