While most plants in the Genus Taraxacum are referred to as dandelions, the most commonly observed species in western Canadian urban green spaces is T. officinale, aka the common dandelion. Entirely edible, this early spring bloomer is beloved by bees, and is one of the easiest plants to start with when diving into the world of natural dyeing.

Note: all the dandelions foraged in this post come from invitations to collect in yards about to be mowed. But am happy to report there is no end of dandelions remaining in the neighbourhood at large for the bees.

TL;DR: Dandelions yield a dark chocolate brown in wool when premordanted with iron and a bright yellow when premordanted with alum. Note, on mohair, a premordant of iron yields more of a military grey - you can find that post here.