Ligustrum Bonsai Care

A Ligustrum bonsai is a compact tree or shrub with glossy, oval leaves arranged in clusters. Some varieties bloom in summer with small white flowers followed by black berries. The tree grows vigorously and is ideal for beginner bonsai enthusiasts.

Location

Sunlight: at least 4–6 hours of daylight per day, preferably in a bright location. Full sun is best in summer, and a bright windowsill location in winter.

Temperature: Approximately 15–24°C indoors. Damage may occur below 6°C; avoid below 4°C.

Overwintering: Outdoors require gradual cooling. Indoors, it should be cool (but above 6°C) and well-lit.

Water gift

A Ligustrum needs more water than other bonsai species.

Frequency: Keep the soil slightly moist. Water as soon as the top 1 cm feels slightly dry. Daily in summer, sometimes even twice a day, and several times a week in winter.

Technique: Water generously until drainage is complete, allowing excess water to drain away. Periodic soaking (5–30 seconds) can help saturate the root ball.

Water quality: Preferably use rainwater or filtered water; room temperature, preferably chlorine-free

Power supply

Growing season (spring–autumn): Feed every 2 weeks with liquid fertilizer on moist soil or solid organic fertilizer every 4 weeks

Winter: reduce feeding to once a month

Pruning and wiring

Pruning:
Prune overgrowth regularly. This can be done throughout the growing season (spring-summer). Prune thick branches before the beginning of spring.

Wiring:
Wired in spring–summer when branches are flexible

Use thin wire to avoid damaging soft bark

Check every 4–6 weeks and remove wire once branch holds shape

Repotting

Frequency: every 1–3 years (younger bonsai need every year) depending on root growth

Period: spring when sprouting or midsummer for slow recovery

Method:
Remove tree and root ball from pot

Prune a maximum of ¼–⅓ of roots

Use well-draining bonsai mix (e.g. akadama + grit)

After repotting: water the soil well and place the tree in partial shade for a few weeks.

Pests and disease

Most common pests: aphids, scale insects, whiteflies, spider mites and whiteflies

Diseases: fungus (leaf spots, mildew) and root rot

Treatment: insecticides and fungicides, preferably organic or sprayed in diluted form

Prevention: good humidity, bright light, correct location and healthy growth