How to Overwinter Japanese laurel Successfully

September 29, 2024 3 min read

Japanese laurel is hardy and can withstand some frost, but proper care ensures it thrives through winter.

Regular inspection for pests and diseases before winter can prevent future problems.

Mulching helps to insulate roots and maintain moisture levels during frosty months.

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Why Overwinter Japanese laurel?

Overwintering Japanese laurel (Aucuba japonica), an attractive evergreen shrub with vibrant green leaves speckled with gold, ensures its health and vitality for the upcoming growing season. While Japanese laurel is hardy and can tolerate frost, giving it the extra care during winter months can enhance its growth and flowering potential. Proper overwintering helps protect the plant from harsh winter conditions and prepares it for a robust and vibrant spring.

Preparing Japanese laurel for Winter

Pruning Japanese laurel Before Winter

Pruning Japanese laurel is essential before the onset of winter. By removing dead or diseased branches, you can prevent infections and promote new growth in spring. Trim branches back to a strong point, and ensure your pruning tools are clean to avoid spreading diseases.

Inspecting for Pests and Diseases

A thorough inspection for pests and diseases is crucial before winter. Look for signs of pests like aphids or spider mites and treat them promptly with appropriate solutions. Early intervention can prevent infestations that are harder to control during winter.

Cleaning and Mulching the Soil

Cleaning up any fallen leaves or debris around your Japanese laurel helps to reduce disease risk. Apply a thick layer of mulch (about 5-7 cm or 2-3 inches) around the base of the plant to insulate the roots, retain moisture, and provide nutrients as the mulch breaks down.

Ideal Conditions for Overwintering Japanese laurel

Temperature Requirements

Japanese laurel can tolerate temperatures down to -10°C (14°F), but in colder regions, it's essential to protect them from extreme cold. Bringing container plants indoors or using frost covers can help.

Humidity Levels

Maintain moderate humidity levels around your Japanese laurel during winter. Placing a humidifier nearby or a water tray can help, especially in heated indoor environments where the air is dry.

Light Exposure

Japanese laurel requires bright, indirect light during winter. Ensure it gets sufficient sunlight by placing it near a window but avoid direct exposure to prevent leaf burn.

Watering and Fertilizing Japanese laurel in Winter

Adjusting Watering Frequency

Water Japanese laurel sparingly during winter. Overwatering can lead to root rot. Allow the top inch or 2.5 cm of soil to dry out between waterings. Always check the soil moisture before watering.

Using Winter-Appropriate Fertilizers

Reduce the frequency of fertilization during winter as the plant's growth slows. Use a balanced, slow-release fertilizer sparingly in fall to prepare the Japanese laurel for the winter months.

Protecting Japanese laurel Against Frost

Using Frost Blankets and Covers

Frost blankets and covers are effective in protecting Japanese laurel from frost. Cover the plant during the night and uncover it during the day to allow sufficient air circulation and light exposure.

Positioning Plants to Avoid Frost Damage

Position your Japanese laurel in a sheltered location, such as near a wall or inside a greenhouse, to shield it from cold winds and frost. For container plants, move them to an unheated garage or basement.

Common Mistakes to Avoid When Overwintering Japanese laurel

Overwatering

Avoid overwatering as it can lead to root rot. Ensure the soil remains slightly dry between watering sessions to maintain healthy roots during winter.

Incorrect Pruning

Incorrect or excessive pruning can stress the plant. Follow proper pruning techniques, removing only unhealthy or dead branches, and avoid heavy pruning right before winter.

Learn More About Japanese laurel