Hypericum calycinum
| Hypericum calycinum | |
| Light: |    |
| Moisture: |   |
| Hardiness: | 6 |
| Soil pH: | 5.6-8.4 |
| Evergreen Self Pollinated | |
| Height: | 1' |
| Width: | 3' |
| Speed: | Fast |
| Blooms: | Early Summer-Early Fall |
| Open Woods Forest | |
| Native to: | |
| Tea: | Yes |
 | |
Hypericum calycinum (common name: rose of sharon)
Propagation: Seed - sow spring in a greenhouse and only just cover the seed. Germination usually takes place within 1 - 3 months at 10°c. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts.
Cuttings of half-ripe wood 10 - 12 cm with a heel, July/August in a frame. Plant out in the following spring[1].
Cuttings of mature wood, 12 - 17cm with a heel, October/November in a sheltered position outdoors. Plants root by the spring. Good percentage[2].
Division in spring as new growth commences[2]. Very easy, 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 spring.
Cultivation: Easily grown in any reasonably good well-drained but moisture retentive soil[3]. Succeeds in dry soils[1] and in chalky soils[4]. Grows well in heavy clay soils. Succeeds in sun or shade but flowers better in a sunny position[4]. Grows well even in the shade of tall trees[3][5][6]. Tolerates poor soils and also drought when it is established[7].
A very cold-hardy plant, tolerating temperatures down to about -25°c[7].
A very ornamental but very invasive plant, spreading by means of stolons[3][8].
Seldom sets seed in Britain, probably due to our wet autumns[8].
Plants are often afflicted with rust disease[8][1]. Plants in this genus are notably resistant to honey fungus[1].
Range: W. Asia - Turkey. Naturalized in Britain.
Habitat: Grassy places and open woods to 1800 metres[7].
Usage: A good ground cover plant[8][9], succeeding in the heavy shade of trees and in dry shade[10][1]. Very vigorous, it can swamp out small plants. For the densest cover plants should be cut to ground level each April[11].
A yellow-orange dye is obtained from the flowers.
Pollinators: Insects, self
Soil: Can grow in light, medium, and heavy soils.
Drainage: Prefers well drained soil.
In Leaf: Evergreen
Seed Ripens: Early Fall-Mid Fall
Flower Type: Hermaphrodite
Heavy Clay: Grows in heavy-clay soils.
Links
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Huxley, Anthony. The New Royal Horticultural Society Dictionary of Gardening. MacMillan Press, 1992.
- ↑ 2.0 2.1 Sheat, Wilfrid. Propagation of Trees, Shrubs and Conifers. St Martin, 1948.
- ↑ 3.0 3.1 3.2 Chittendon, Fred. RHS Dictionary of Plants. Oxford University Press, 1951.
- ↑ 4.0 4.1 Bean, William. Trees and Shrubs Hardy in Great Britain. Murray, 1981.
- ↑ Riotte, Louise. Carrots Love Tomatoes. Garden Way, 1978.
- ↑ Brown, George. Shade Plants for Garden and Woodland.
- ↑ 7.0 7.1 7.2 Phillips, Roger and Martyn Rix. Shrubs. Pan Books, 1989.
- ↑ 8.0 8.1 8.2 8.3 Thomas, Graham. Ornamental Shrubs, Climbers and Bamboos. Murray, 1992.
- ↑ Thomas, Graham. Plants for Ground Cover. Everyman, 1990.
- ↑ Chatto, Beth. The Damp Garden. Dent, 1982.
- ↑ Napier, Elspeth. Ground Cover Plants. Cassells, 1989.