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Chrysanthemum marshallii is a Perennial
It is harvested from the wild for local use as a source of materials.
Europe to W. Asia - Caucasia.
We have very little information on this species and do not know if it will be hardy in Britain, though judging by its native range it could succeed outdoors in many parts of this country. It is quite probable that this plant properly belongs to the genus Tanacetum[
]. The following notes are based on the general needs of the genus.
Succeeds in ordinary garden soil[
]. Prefers a well-drained fertile soil in full sun[
The dried flower heads (actually the yellow inner petals[
]) are used to make the insecticide 'pyrethrum'[
Seed - surface sow in a greenhouse or cold frame in the spring. If the seed does not germinate within 4 weeks it can be chilled for 3 weeks at about 3°c and then be returned to the greenhouse[
]. When they are large enough to handle, prick the seedlings out into individual pots and plant them out into their permanent positions in the summer.
Division in spring. Larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the summer or following spring.