Rubiaceae
Snow Rose (Serissa japonica): Complete Care Guide
Serissa japonica
Serissa japonica thrives in bright indirect light and requires consistently moist but well-draining soil. It is sensitive to changes in temperature, light, and watering routines, often responding by dropping leaves. Maintain high humidity and avoid sudden environmental shifts for best results.
Every 4 days
Bright indirect
10° - 30°C
50% - 70%
Categories
What is Snow Rose?
Snow Rose (Serissa japonica) is a hard-care plant from the Rubiaceae family. Serissa japonica, commonly known as Snow Rose or Tree of a Thousand Stars, is a small evergreen to semi-evergreen shrub native to Southeast Asia. It is beloved in bonsai culture for its delicate star-shaped white or pink flowers, fine branching structure, and rough grey bark. Despite its elegant app...
Snow Rose grows up to 1.2m, with spread of 130cm, watering every 4 days, 10°C – 30°C, 50–70% humidity. It is suitable for indoor environments and safe for pets.
Care Guide
How to Water
Water every 3-4 days in summer, allowing the top 1.5 cm of soil to dry slightly between waterings. Reduce to once weekly in winter. Never let the soil dry out completely, but avoid waterlogging as root rot is a serious risk.
Lighting
Place in bright indirect light near an east or west-facing window. Avoid harsh afternoon direct sun which can cause leaf burn. Supplement with grow lights in winter if natural light is insufficient.
Ideal Soil
Use well-draining, slightly acidic soil (pH 5.5-6.5) rich in organic matter. A quality bonsai mix or a blend of loam, perlite, and peat works well. Avoid calcareous (lime-rich) water when irrigating.
Recommended Pot
Ceramic or clay pots are ideal for bonsai training as they regulate moisture well. Ensure excellent drainage holes. For container growing, unglazed terracotta helps prevent overwatering.
Care Schedule
Fertilize
Every 30 days
Misting
Every 3 days
Rotate
Every 30 days
Repot
Every 365 days
About Snow Rose
Serissa japonica, commonly known as Snow Rose or Tree of a Thousand Stars, is a small evergreen to semi-evergreen shrub native to Southeast Asia. It is beloved in bonsai culture for its delicate star-shaped white or pink flowers, fine branching structure, and rough grey bark. Despite its elegant appearance, it is considered a challenging plant due to its sensitivity to environmental changes.
How to Propagate
Semi-hardwood Stem Cutting
Bottom heat significantly improves rooting success. Cuttings can also be rooted in water; change water weekly to prevent rot.
- 1 Take a 10 cm semi-hardwood cutting with 2-3 nodes in early summer
- 2 Remove lower leaves and dip the cut end in rooting hormone
- 3 Insert into a moist peat-perlite mix
- 4 Cover with a plastic bag or humidity dome to retain moisture
- 5 Keep in a warm location with bottom heat if possible
- 6 Transplant once roots are established after 3-6 weeks
Materials needed:
Characteristics
Max height
1.2m
Spread
1.3m
Growth rate
Medium
Foliage
Semi-evergreen
Plant Uses
Ornamental
Great for decoration
Is your plant showing symptoms?
Click on the symptom to discover possible causes:
Common Problems
Root Rot
Root rot is a serious fungal disease that affects the root system of plants, causing them to decay and die. It is primarily caused by overwatering, poor drainage, or soil-borne fungi such as Pythium, Phytophthora, Rhizoctonia, and Fusarium. The disease thrives in waterlogged conditions where roots are deprived of oxygen, making them susceptible to fungal infection.
Spider Mites
Spider mites are tiny arachnids (less than 1/20 inch long) related to spiders and ticks that feed on plant sap. They thrive in hot, dry conditions and can cause significant damage to ornamental and vegetable plants. During severe infestations, crop losses can reach 14% or higher as these pests disrupt vital plant processes including photosynthesis, carbon dioxide absorption, and transpiration.
Aphids
Aphids are small, soft-bodied, pear-shaped insects (1/16 to 1/8 inch long) that feed by sucking nutrient-rich sap from plants. They reproduce rapidly and can quickly weaken plants, causing distorted growth and transmitting plant viruses. Aphids come in various colors including green, black, red, yellow, brown, and gray. They secrete honeydew, a sticky substance that attracts ants and encourages sooty mold growth.
Scale Insects
Scale insects are small sap-sucking pests that appear as brown, shell-like bumps on plant stems and leaves. There are over 25 species, divided into armored (hard) and unarmored (soft) scales. They feed by piercing plant tissue and extracting sap, which weakens the plant and can lead to yellowing, stunted growth, and even death if left untreated. They also excrete honeydew, which attracts ants and promotes sooty mold growth.
Meaning & Symbolism
In bonsai tradition, Serissa japonica symbolizes patience, endurance, and the harmony between humanity and the natural world. Its ability to bloom prolifically despite its small stature represents resilience and beauty in adversity.
Fun Facts
Serissa japonica can bloom for up to 9 months of the year, earning its nickname Tree of a Thousand Stars.
Despite being native to Southeast Asia, it has become one of the most popular bonsai species worldwide.
The plant's Latin name foetida (from older classification) means 'foul-smelling', referring to the unpleasant odor released when its bark or leaves are crushed.
Even experienced bonsai artists consider Serissa one of the most rewarding yet challenging species to master.
Frequently asked questions
Why is my Snow Rose dropping leaves?
How often should I water my Snow Rose?
Is Serissa japonica toxic to pets?
Can I grow Snow Rose indoors?
When does Snow Rose bloom?
Compare with similar plants
| Attribute | Difficulty | Light | Watering | Pet Safe |
|---|---|---|---|---|
| Fiddle Leaf Fig | Hard | Bright indirect | 10d | ⚠️ |
| Round-leaf Calathea | Hard | Partial shade | 7d | ✓ |
| African Mask Plant | Hard | Partial shade | 5d | ⚠️ |
| Rex Begonia | Hard | Partial shade | 7d | ⚠️ |
