Manchurian alder

Manchurian alder should be watered on a weekly basis. Water thoroughly to ensure soil is evenly saturated throughout the pot and allow it to drain afterwards. During dry, hot weather, it may need to be watered more frequently. However, make sure not to over-water it as it can easily become water-logged. In the winter, the frequency of watering should be reduced to only when the top of the soil is dry to the touch. These plants prefer acidic soil, so if your soil is alkaline you may need to water with rainwater or use a water conditioner to reduce the pH level.

Manchurian alder (Alnus hirsuta) is a deciduous tree that grows in light shade to full sun. It prefers a sunny location but can tolerate some light shade. It grows best in moist, well-drained soils in areas with cool summers and mild winters. When planted in areas with more sun, it will need supplemental watering during hot, dry periods. For optimal growth and health, Manchurian alder needs at least 6 hours of direct sunlight per day. In areas with strong sunlight, the tree benefits from dappled shade during the hottest part of the day.

The Manchurian alder should be pruned in late winter or early spring while the tree is still dormant. Pruning should be limited to removing dead, diseased, or damaged wood as well as crossing or rubbing branches. To maintain the plant's natural shape and promote health, up to a quarter of the branches can be thinned. This will reduce the number of competing stems and encourage better air flow. For more information on pruning Manchurian alders, consult your local garden center or extension office.