Yarrowstalks was an underground newspaper (and later a magazine), primarily based in Philadelphia, Pennsylvania, that published 12 issues from 1967 to 1975.

Like the San Francisco Oracle, Yarrowstalks combined poetry, spirituality, and multicultural interests with psychedelic design, reflecting and shaping the countercultural community as it developed in Philadelphia.

The name of the publication is derived from Achillea millefolium ["yarrow"];[3] the stalks are dried and used as a randomizing agent in I Ching divination.

[3] From London, Zahn put the publication on hiatus as he traveled in India, presumably — like many others of the era — seeking spiritual enlightenment.

[10][5] Rather than repeat himself, Crumb drew a new assortment of strips (published in February 1968 by Don Donahue) which replaced the missing issue.

With issue #8 (again following a two-year hiatus), the publication converted to a magazine format,[3] with the publisher returning to Philadelphia for good this time.