Cherry blossom

Fertilizing

Cherry blossom bonsai require slightly acidic fertilizer that won't harm the root system. During the growing season, use a balanced NPK fertilizer every 2-4 weeks. Switch to a higher phosphorus content as flowering season approaches. Reduce fertilization in fall and avoid it entirely during winter dormancy to prevent unwanted growth. Never use opened fertilizer bags as they may contaminate the soil.

Proper fertilization is crucial for supporting healthy leaf, stem, and flower development. Over-fertilizing leads to excessive foliage at the expense of flowers, while under-fertilizing results in poor growth and fewer blooms. Only use sterile, premixed bonsai fertilizers from reputable sources.

Placement

Your cherry blossom bonsai needs 5-7 hours of partially shaded sunlight daily. Place it where it receives morning sun and afternoon shade, especially during summer to prevent leaf burn. The tree requires temperatures between 15-25°C (59-77°F) during growing season and 0-10°C (32-50°F) in winter for proper dormancy.

For winter protection in harsh climates, move the bonsai to a cool, frost-free location like an unheated garage or shed. This allows the necessary dormancy period while protecting from extreme cold. Monitor the tree's response to its placement, as it can take up to three weeks to show signs of stress from improper lighting or temperature.

Pruning

Prune cherry blossom bonsai at different times for different purposes. Perform structural pruning during the dormant season in late winter, removing unwanted branches that disrupt the tree's shape. During spring and summer, maintain the shape through regular trimming of new growth, pinching leaves, and removing flower buds as needed to control energy distribution.

When pruning, use proper tools including pruning shears for small to medium branches, concave cutters for larger branches, and knob cutters for unwanted trunk growths. This regular maintenance helps balance growth and maintain the tree's miniature size while encouraging healthy development. Root pruning should be done during repotting to encourage new growth and maintain pot fit.

Repotting

Repot cherry blossom bonsai every two to three years in early spring, just before the growth cycle begins. Young, vigorous trees may need annual repotting, while mature specimens can go longer between repottings. Use a well-draining bonsai soil mix containing equal parts akadama, pumice, and lava rock.

Choose a pot slightly larger than the previous one that complements the tree's style. When repotting, carefully remove the tree, trim roots as needed without excessive pruning, and ensure no air pockets remain when placing in fresh soil. After repotting, keep the tree in a shaded area and avoid fertilizing for about a month while monitoring water needs as soil moisture retention may differ.

Watering

The watering frequency depends on various factors including pot size, soil type, and environmental conditions. Water thoroughly when the topsoil feels slightly dry, ensuring water runs out of the drainage holes. Cherry blossoms can tolerate watering every 2-4 weeks but prefer bi-weekly watering during growing season.

Reduce watering frequency during winter dormancy. Watch for signs of over-watering (yellowing leaves, lack of vigor) or under-watering (dried leaves, wilting). During hot or windy weather, you may need to water twice daily. Maintain consistent moisture without waterlogging, as cherry blossoms are susceptible to root rot from excessive water.

References

How to Care for a Cherry Blossom Bonsai Tree Cherry Blossom Bonsai Care Guide