Petasites speciosa - (Nutt.)Piper.
(Nutt.)Piper.
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Washington State University Marion Ownbey Herbarium (WS-)
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Division of Botany, Yale Peabody Museum
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Conveyor Belt
Description
Petasites speciosa is a PERENNIAL at a fast rate.The species is dioecious (individual flowers are either male or female, but only one sex is to be found on any one plant so both male and female plants must be grown if seed is required). and is pollinated by Insects. The plant is not self-fertile. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in full shade (deep woodland) semi-shade (light woodland) or no shade. It prefers moist or wet soil.
Edible Uses
Salt. Leaves - cooked. The ash of the plant is used as a salt substitute. The stems and leaves, whilst still green, are rolled up into balls, dried and then placed on top of a very small fire on a rock and burned. A very acceptable condiment for piñole.
Distribution
North-western N. America.
Where It Grows
Coming Soon
Cultivation
We have very little information on this species and do not know if it will succeed in Britain, though judging by its native range it should succeed outdoors in most parts of the country. This species is seen as no more than a part of P. frigidus by some authorities. The following notes are based on the general needs of the genus. Succeeds in ordinary garden soil, but prefers a deep fertile humus-rich soil that is permanently moist but not stagnant, succeeding in shade, semi-shade or full sun. Prefers partial shade. Plants can be grown in quite coarse grass, which can be cut annually in the autumn. A very invasive plant, too rampant for anything other than the wild garden. Dioecious, male and female plants must be grown if seed is required.
Propagation
Seed - we have no information on this species but suggest sowing the seed in a cold frame as soon as it is ripe or in early spring. Only just cover the seed and do not allow the compost to dry out. When they are large enough to handle, prick the seedlings out into individual pots and plant them out in the summer. Division succeeds at almost any time of the year. Very easy, larger divisions can be planted out direct into their permanent positions. We have found that it is better to pot up the smaller divisions and grow them on in light shade in a cold frame until they are well established before planting them out in late spring or early summer.
