Practical
Plants

Calochortus clavatus

a member of the Calochortus genus in the family Calochortaceae.

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Taxonomy and growth

Height
1 m
Fertility
Insects
Flower type
hermaphrodite
Pollinators
Insects

Uses

Edible uses

This section contains historical Plants For A Future notes marked noncommercial.

Bulb - raw or cooked[9][4].

Plant part
Root

Environment

Range
South-western N. America - California.
Habitat
Dry, often rocky slopes below 1200 metres[7], usually on serpentine soils[8].
Light
full sun
Shade tolerance
no shade
Water
moderate
Hardiness
Zone 3+
Soil textures
sandy, loamy
Soil pH
acid, neutral, alkaline
Drainage
well drained
Tolerates Nutritionally Poor Soil
No
Drought
intolerant

Propagation

This section contains historical Plants For A Future notes marked noncommercial.

Seed - sow as soon as ripe or early spring in a cold frame in a very sharply draining medium. Stratification may be helpful. Germination usually takes place within 1 - 6 months at 15°c[3]. Leave the seedlings undisturbed for their first two years growth[3], but give them an occasional liquid feed to ensure they do not become nutrient deficient. It is quite difficult to get the seedlings through their first period of dormancy since it is all too easy either to dry them out completely or keep them too moist when they will rot[6]. After their second year of growth, pot up the dormant bulbs in late summer and grow them on for at least another 2 years in the greenhouse before trying them outside. Seedlings take about 5 - 7 years to come into flower[6]. Division of the bulbs as soon as the foliage dies down. The bulbs can be planted straight out into their permanent positions but in areas with wet winters it might be best to store them overwinter and replant them in the spring. Stem bulbils, harvested from the stems after flowering. They can be stored cool and dry then planted in pots in the cold frame in the spring.

Cultivation

This section contains historical Plants For A Future notes marked noncommercial.

Requires a deep very well-drained fertile sandy soil in a hot sunny position and must be kept dry over winter[1][5]. The bulb requires reasonable moisture from early winter until summer but must then be kept dry[8]. This is a rather difficult plant to cultivate in Britain, it is a very cold hardy plant but is intolerant of wetness especially in the winter. It is easiest to grow in a bulb frame but is worth trying outdoors at the base of a south-facing wall, especially with shrubs that like these conditions[2]. It should not be crowded by other plants[6]. Bulbs have succeeded in a cold frame with the cover removed from March to October[6]. Bulbs can be lifted as soon as the foliage dies down in the summer and stored overwinter in a cool dry place, replanting in spring[3]. Bulbs frequently divide after flowering, the bulblets taking 2 years to reach flowering size[5]. Hand pollination is necessary if seed is required[1].

References

  1. F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press 1951-00-00

    ↩1↩2

  2. ? The Plantsman. Vol. 2. 1980 - 1981. Royal Horticultural Society 1980-00-00

    ↩

  3. Bird. R. (Editor) Growing from Seed. Volume 3. Thompson and Morgan. 1989-00-00

    ↩1↩2↩3

  4. Yanovsky. E. Food Plants of the N. American Indians. Publication no. 237. U.S. Depf of Agriculture.

    ↩

  5. Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992-00-00 ISBN 0-333-47494-5

    ↩1↩2

  6. Matthews. V. The New Plantsman. Volume 1, 1994. Royal Horticultural Society 1994-00-00 ISBN 1352-4186

    ↩1↩2↩3↩4

  7. Munz. A California Flora. University of California Press 1959-00-00

    ↩

  8. Phillips. R. and Rix. M. Bulbs Pan Books 1989-00-00 ISBN 0-330-30253-1

    ↩1↩2

  9. Balls. E. K. Early Uses of Californian Plants. University of California Press 1975-00-00 ISBN 0-520-00072-2

    ↩

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