Rose Tree of China
First, scarify the seeds. For faster germination, soak the seeds in slightly hot water for 24-48 hours, followed by 2-3 months cold stratification before sowing in your soil. Sow at 1 inch deep in moist soil. Lights aid germination. The seeds can be rather slow, sometimes taking 18 months to germinate. Prick out the seedlings into individual pots when they are large enough to handle.
Scarification / Stratification Seed coats may be so hard that they are impermeable to water. They need to be scratched or broken using a knife or sandpaper, in order to germinate. Chip the seeds with a sharp knife or make a few swipes with a sharp edged file or use sandpaper to allow moisture being more readily absorbed.
Prunus triloba, the Rose Tree of China or Flowering Almond, is a decidious shrub growing to 4 meters by 4 meters. It grows abundantly in East Asia, North Korea and China. They make nice bonsai. One of the first tree to blossom in Spring. These beautiful flowers put up an impressive show in Spring, when masses of pink flowers that resemble small roses, cover all branches even before foliage emerges. Regular pruning is needed for best performance.The flowers are hermaphrodite, they have both male and female organs. Flowers may be followed by globose red fruit. The medium-green leaves of the Flowering Almond shrub have an elongated oval shape, and finely toothed edges, to 2.5" long. They are often three lobed, hence the specific epithet. Yellow to bronze Fall color. The bark is brown. Hardiness zones 3-6, (-37°C/-35°F, -20°C/-5°F) in Winter. It requires moist soil. Thrives in a well-drained moisture-retentive loamy soil. Prefers some lime in the soil but is likely to become chlorotic if too much lime is present. Succeeds in sun or partial shade though it fruits better when growing in a sunny position. It cannot grow in the shade.