Spiraea thunbergii
TAXONOMY
FamilyRosaceae
GenusSpiraea
Zone4
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Spiraea thunbergii, commonly known as Thunberg Spirea, is a deciduous shrub in the Rosaceae family. Native to Japan and China, it is known for its delicate, white flowers that bloom in early spring. The plant has a graceful, arching habit and fine-textured foliage that turns a beautiful yellow in the fall. It is well-suited to temperate climates and is often used in borders, hedges, and as a specimen plant.
ALSO KNOWN AS
Awayus Japonicus
Thunberg Spirea
Spiraea japonica
OVERVIEW
VPDCalculate
WaterMoist
SoilLoamy
LightDirect Bright (6 Hours)
Temperature18° C
Humidity50%
Dormancy3 Months
pH6.5
Pressure1,013 mbar
DETAILS
Care Instructions
Thunberg Spirea is relatively easy to care for. It prefers full sun to partial shade and should be watered regularly, allowing the soil to dry out partially between waterings. The plant thrives in moderate temperatures and average humidity levels. It is hardy and can tolerate a range of conditions, making it a versatile addition to many gardens.Soil
Spiraea thunbergii prefers well-drained loamy soil but can tolerate a variety of soil types, including clay and sandy soils. Good drainage is essential to prevent root rot. Adding organic matter to the soil can improve its structure and fertility, providing the plant with the nutrients it needs to thrive.Fertilizer
A balanced fertilizer with an N-P-K ratio of 10-10-10 is suitable for Thunberg Spirea. Fertilize in early spring before new growth begins and again in mid-summer if needed. Avoid over-fertilizing, as this can lead to excessive foliage growth at the expense of flowers.Repotting
While Spiraea thunbergii is typically grown outdoors, young plants or those in containers may need repotting every 2-3 years. Repot in early spring before new growth starts. Choose a pot that is slightly larger than the current one and use fresh, well-draining soil.Propagation
Thunberg Spirea can be propagated by softwood cuttings taken in late spring or early summer. Cut a 4-6 inch section of new growth, remove the lower leaves, and dip the cut end in rooting hormone. Plant the cutting in a pot with a well-draining soil mix and keep it moist until roots develop.Pruning
Pruning is beneficial for maintaining the shape and health of Thunberg Spirea. Prune immediately after flowering to remove spent blooms and any dead or damaged branches. Light pruning can also be done in late winter to encourage new growth and more abundant flowering.Toxicity
Spiraea thunbergii is not known to be toxic to pets or humans. However, as with all plants, it is best to discourage pets and children from ingesting any part of the plant.Additional
Thunberg Spirea is a low-maintenance shrub that can add beauty and structure to a garden. It is deer-resistant and attracts pollinators such as bees and butterflies. Mulching around the base of the plant can help retain moisture and suppress weeds.REVOLUTIONIZE YOUR PLANT CARE
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