This section is from the book "The Gardener's Monthly And Horticulturist V23", by Thomas Meehan. See also: Four-Season Harvest: Organic Vegetables from Your Home Garden All Year Long.
Many of my correspondents ask for particulars and directions to guide them in the cultivation of the Pyrethrum seed, which has been sent to them. As its cultivation in many of the localities where it will be tried is an experiment, it will devolve upon the recipients to largely use their own judgment in sowing and cultivating, and I would simply advise to treat it as they would the ordinary Asters of the garden, or any other perennial composite plant. The P. cinera-riaefolium, a native more particularly of Dalmatia, is already cultivated at Stockton, Cal., and is first sown in prepared beds of fine, loose sand and loamy soil, with fine manure, the seed being mixed with dry sand and sown carefully on the top of the bed, which is then raked so as to stir the surface to about half an inch in depth. The ground should be kept moist, but not too wet. The plants should be carefully weeded and transplanted to a loamy soil during the autumn. The P. roseum, a native more particularly of Persia and South Asia, has already to a limited extent been cultivated in this country in gardens, for its pale rose or bright pink flower rays.
It will undoubtedly thrive best in the more temperate zone and in the mountainous regions of the South. The flowers heads, at blooming time, should be gathered, dried and pulverized for use, though the whole plant possesses insecticide properties which may be made use of by alcoholic solution.