Hyssopleaf thoroughwort has thin leaves arranged in whorls and develops abundant clusters of small white tubular disc flowers in late summer into fall, acting as a pollinator magnet. The beautiful seed heads remain into winter serving as food for birds. It spreads by rhizomes and self-seeds. It is a host plant for the clymene moth. 
If sown indoors, requires 8 weeks of cold stratification. Good candidate for winter sowing. Light required for germination so surface sow or cover lightly.