Betula platyphylla
| Betula platyphylla | |
| Light: |  |
| Moisture: |   |
| Hardiness: | 5 |
| Soil pH: | 5.6-8.4 |
| Height: | 66' |
| Speed: | Fast |
| Blooms: | Mid Spring-Late Spring |
| Open Woods Forest | |
| Native to: | |
| Edible Rating: |  |
| Medicinal Rating: |  |
| Tea: | Yes |
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Betula platyphylla (common name: white birch)
Propagation: Seed - best sown as soon as it is ripe in a light position in a cold frame[1][2][3][4]. Only just cover the seed and place the pot in a sunny position[1][2][4]. Spring sown seed should be surface sown in a sunny position in a cold frame[3][4]. If the germination is poor, raising the temperature by covering the seed with glass can help[4]. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in a cold frame for at least their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts.
If you have sufficient seed, it can be sown in an outdoor seedbed, either as soon as it is ripe or in the early spring - do not cover the spring sown seed. Grow the plants on in the seedbed for 2 years before planting them out into their permanent positions in the winter[1][2][3][4].
Cultivation: Succeeds in a well-drained loamy soil in a sunny position[5][6]. Tolerates most soils including poor soils and heavy clays[6]. Fairly wind tolerant[6].
A fast-growing but short-lived tree[6].
Hybridizes freely with other members of this genus[7]. This species is closely related to B. pendula[5].
A good plant to grow near the compost heap, aiding the fermentation process[8].
Trees are notably susceptible to honey fungus[6].
Range: E. Asia - northern China, Japan, Korea, Siberia.
Habitat: Highlands, C. and N. Japan[9].
Edibility: Inner bark - cooked. Rich in starch[10]. It can be dried and ground into a meal and used as a thickener in soups etc or mixed with flour for making bread, biscuits etc. Inner bark is generally only seen as a famine food, used when other forms of starch are not available or are in short supply[K].
Sap. Used for making a vinegar[10].
Medicinal: The bark of the sub-species Betula platyphylla japonica is often used medicinally in Korea. It contains several medically active constituents including triterpenoids and flavonoids and is antifungal, anti-inflammatory and tonic[11]. It is used in the treatment of conditions such as internal diseases and inflammation[11].
The root bark, and other parts of the plant, show anticancer activity[12].
Pollinators: Wind
Soil: Can grow in light, medium, and heavy soils.
Drainage: Prefers well drained soil.
Wind: Tolerates strong winds
Seed Ripens: Early Fall
Flower Type: Monoecious
Heavy Clay: Grows in heavy-clay soils.
Also Known As: B. verrucosa platyphylla.
Links
References
- ↑ 1.0 1.1 1.2 Sheat, Wilfrid. Propagation of Trees, Shrubs and Conifers. St Martin, 1948.
- ↑ 2.0 2.1 2.2 McMillan-Browse, Philip. Hardy Woody Plants from Seed. Grower Books, 1985.
- ↑ 3.0 3.1 3.2 Dirr, Michael and Charles Heuser. The Reference Manual of Woody Plant Propagation. Athens Ga. Varsity Press, 1987.
- ↑ 4.0 4.1 4.2 4.3 4.4 Rice, Graham. Growing from Seed Volume 2. Thompson and Morgan, 1988.
- ↑ 5.0 5.1 Bean, William. Trees and Shrubs Hardy in Great Britain. Murray, 1981.
- ↑ 6.0 6.1 6.2 6.3 6.4 Huxley, Anthony. The New Royal Horticultural Society Dictionary of Gardening. MacMillan Press, 1992.
- ↑ Tutin, Tom et al.. Flora Europaea. Cambridge University Press, 1964.
- ↑ Riotte, Louise. Carrots Love Tomatoes. Garden Way, 1978.
- ↑ Ohwi, Jisaburo. Flora of Japan. Smithsonian Institution, 1965.
- ↑ 10.0 10.1 Kunkel, Günther. Plants for Human Consumption. Koeltz Scientific Books, 1984.
- ↑ 11.0 11.1 Medicinal Plants in the Republic of Korea. World Health Organisation, 1998.
- ↑ Duke, James and Edward Ayensu. Medicinal Plants of China. Reference Publications, 1985.