Bonsai Placement: Sunlight, Airflow & Seasonal Care

Good bonsai placement starts with an outdoor spot that gets sunlight and good airflow. Whether you grow bonsai in a garden or on a balcony, check the light, wind and heat from the ground or floor before choosing a spot.

Getting Enough Sunlight

At least three hours of morning sun is a useful starting point. Give sun-loving trees such as Japanese black pine and shimpaku juniper a position with longer sun exposure. Buildings and nearby trees cast shade, so check how many hours of sunlight the spot actually gets.

Protect deciduous trees such as Japanese maples from intense summer sun. A spot with partial shade—morning sun and afternoon shade—can be a good summer position.

Airflow and Pot Position

  • Spacing: Leave enough room between pots so branches and foliage do not overlap and air can circulate.
  • Benches and stands: Use a stable bench or stand rather than placing pots directly on concrete or stone that gets hot in summer.
  • Wind: Avoid direct blasts from outdoor air-conditioning units and winds strong enough to knock pots over.

Seasonal Bonsai Placement

SeasonPlacement and care
SpringProvide good sunlight. Once buds begin to grow, move trees under the eaves or to another sheltered spot on nights when late frost is forecast.
SummerAvoid strong afternoon sun and reflected heat. Use a reed screen or shade cloth when needed, while keeping good airflow.
AutumnAs the heat eases, reduce shading to provide more sunlight. Gradually reintroduce trees that have been kept in shade to stronger light.
WinterProtect trees from cold winds and frost in a sheltered spot, such as under the eaves. Where the soil stays frozen into the daytime, use an unheated shelter.

Keep pines and deciduous trees cool enough to remain dormant during winter protection. Ventilate shelters on sunny days to prevent overheating.

Indoor Display and Moving Your Bonsai

Displaying indoors: Bring an outdoor bonsai inside only while you are displaying it, away from heating and air-conditioning vents. Return it to its usual outdoor spot afterward.

After buying or repotting: Ask the seller how much sunlight a newly purchased tree has been getting. After repotting, protect it from strong sun and wind. Whenever you change its position, check how quickly the soil dries.

Tropical species such as Ficus microcarpa need warmer winter conditions suited to their cold tolerance.

For an overview of daily care and seasonal work, see Bonsai for Beginners in our Bonsai Guide.