Spiraea little princess is a plant that is native to China and Japan. It is a deciduous shrub that typically grows to be about 2-3 feet tall and wide. The leaves of the plant are ovate shaped and are dark green in color. The flowers of the plant are white and bloom in the summer.
Related plant:
Spiraea Grefsheim
Related plant:
Spiraea Betulifolia Tor
About soil condition, the best thing for Spiraea little princess is well-drained soil. If your soil is too heavy, try to improve it by mixing in some organic matter. The plant does not like to have "wet feet," so make sure the soil is not soggy. If you have a problem with drainage, you may need to create a raised bed for your plant.
Similar to other members of its family, the Spiraea Little Princess requires a fair amount of sun to remain healthy. It should have at least six hours of sunlight every day, though it can tolerate a little less. The plant will also do well in partial shade, but it may not produce as many flowers in these conditions.
The temperature conditions that are best for spiraea little princess are cool to cold temperatures. This plant does not like it when the temperature gets too hot. The ideal temperature range for this plant is between 10 and 20 degrees Celsius. If the temperature gets too hot, the leaves of the spiraea little princess will start to turn yellow and the flowers will start to fade.
Ideal humidity condition for this plant is moist soil but not waterlogged. It is best to place the plant in an area with good drainage to avoid root rot. It is also important to mist the leaves regularly to prevent them from turning brown and crisp.
Regarding fertilizer, this family of plant is noted for being heavy feeders. A good rule of thumb is to use 1/2 the amount recommended on the fertilizer package. Withholding fertilizer will result in fewer, but larger flowers. It's best to feed them heavily in early spring, then taper off as the season progresses. When it comes to the roots, they are relatively shallow and need to be kept moist. Be sure to water regularly and deeply. If the plant is allowed to dry out, it will quickly wilt and die.
Pruning your Spiraea little princess correctly will ensure healthy growth and prevent the plant from becoming overgrown. To prune, start by removing any dead or damaged branches. Next, cut back any branches that are growing out of shape. Finally, cut back any branches that are crowding or rubbing against other branches.
Propagation is best by seed in the spring, or by softwood cuttings in late spring or early summer. Sow seed on the surface of a moist, well-drained seed-starting mix and press down gently. Water with a fine mist sprayer and keep moist during germination which takes about 21-30 days. When seedlings are large enough to handle, transplant into 4-inch pots. Cuttings can be taken from new growth in late spring or early summer. Use a sharp knife or pruning shears to take 4-6 inch cuttings from the tips of the stems. Strip off the lower leaves and dip the cut end into a rooting hormone. Plant the cutting in a 4-inch pot filled with a moist, well-drained seed-starting mix. Water with a fine mist sprayer and keep the cutting moist until roots have developed and new growth begins, which takes about 4-6 weeks.
Usually, the plant growth rate is about 3 to 5 inches per year. However, the growth rate may differ according to the type of Spiraea you have. The plant growth rate for Spiraea x billardii is about 12 inches per year.
Common problems for this kind of plant are black spot, rust, and powdery mildew. These can be controlled with fungicides. Other problems include aphids, scale, and caterpillars. These can be controlled with insecticides.
Source:
JC Raulston Arboretum - Our Plants - Spiraea japonica 'Little Princess'
Spiraea japonica 'Little Princess' habit: UIPLANTS
Spiraea japonica 'Little Princess' habit: UIPLANTS