Udo: complete guide

Overview

Aralia cordata, known as Udo or Japanese Asparagus, is a remarkable plant from the Araliaceae family. This Japanese ornament is prized for its spectacular large heart-shaped leaves and architectural value.

Appearance & Bloom

Aralia cordata is particularly striking for its large heart-shaped, oblong leaves reaching 20-40 cm in length. The leaves are glossy dark green. The plant grows as a herbaceous perennial, reaching 60-120 cm in height.

Ideal Location

Aralia cordata thrives best in dappled shade or full shade. This is not a plant for full sun. Ideal for beneath large trees, against sun-facing house walls.

Soil

Aralia cordata prefers moist, humus-rich soils with pH between 5.0 and 7.2. Add generous amounts of organic matter.

Watering

During the growing season, it requires regular watering. It prefers moister soils. During very dry periods, misting helps.

Pruning

Minimal pruning is needed. In early spring, you can remove yellowed foliage.

Maintenance Calendar

Feb-March: Check for winter damage. Add compost. April-May: Active growth. Regular watering. June-August: Summer growth. September-October: Flowers appear. November-January: Winter dormancy.

Winter Hardiness

Aralia cordata is hardy to approximately -5 to -10 degrees Celsius. In temperate regions, it grows without special protection.

Companion Planting

Combines with Hosta, Hydrangea, Mahonia, Helleborus, and ferns.

Culinary Note

The young shoots are edible and sought after in Japanese cuisine as Udo.

Closing

Aralia cordata is a fascinating, multi-functional plant for shade-tolerant flora with spectacular foliage.