Water Oak 150/175cm (5L)

Water Oak – Quercus nigra is a handsome deciduous tree from the southeastern United States, valued for its graceful habit and attractive foliage. This oak species brings a touch of North American character to gardens, offering excellent shade and seasonal interest throughout the year. The tree develops a broad, rounded crown that provides generous coverage, making it ideal for larger garden settings where space allows for its natural development.

The foliage of Quercus nigra is particularly distinctive, with leaves that are quite variable in shape, ranging from narrow and unlobed to three-lobed at the tip. Unlike many oaks, the leaves are relatively small and delicate in appearance, measuring 5-12cm in length. They emerge a fresh blue-green in spring, maturing to a deeper green through summer before turning yellow-brown in autumn. The leaves often persist on the tree well into winter, providing structure and interest during the colder months.

The bark develops character as the tree matures, becoming dark grey to almost black with deep furrows and ridges that add textural interest to the winter garden. In spring, the tree produces inconspicuous greenish-yellow catkins, followed by small acorns that ripen in their second year. These acorns are rounded, measuring approximately 1-1.5cm in diameter, and provide valuable food for wildlife.

Water Oak adapts well to various soil conditions, though it naturally occurs in lowland areas and tolerates moisture better than many oak species. Despite its common name, it performs admirably in normal garden conditions once established. The tree shows good tolerance to urban pollution and compacted soils, making it suitable for parks and larger residential gardens where air quality may be compromised.

This specimen measures 150/175cm in height and is supplied in a 5-litre pot, providing a well-established root system that ensures reliable establishment. At this size, the tree is ready to make an immediate impact whilst remaining manageable for planting and initial care.

Care Guide

Plant in full sun or partial shade in any reasonably fertile, well-drained soil. Water Oak tolerates a wide range of soil types, including clay, loam and sandy soils, and shows better tolerance of moisture than many oak species. While it adapts to drier conditions once established, it performs best with consistent moisture during its first few growing seasons.

Water regularly during the first two years after planting, particularly during dry spells in spring and summer. Apply a generous layer of organic mulch around the base, keeping it clear of the trunk, to conserve moisture and suppress weeds. This also helps moderate soil temperature and gradually improves soil structure as it breaks down.

Feed in early spring with a balanced slow-release fertiliser to encourage healthy growth. Avoid high-nitrogen feeds that promote soft growth susceptible to frost damage. Minimal pruning is required, though any necessary shaping should be carried out during late autumn or winter when the tree is dormant. Remove any dead, diseased or crossing branches to maintain a clear framework.

Water Oak shows good resistance to most pests and diseases, though it may occasionally be affected by oak powdery mildew or oak processionary moth in some areas. The tree is hardy and tolerates cold winters well once established, though young specimens benefit from protection during their first winter if exposed to harsh winds.

Ultimate height
Higher than 12 metres

Time to ultimate height
20–50 years

Ultimate spread
8–12 metres

Please note: Decorative pots shown are for display purposes only. Your tree will be supplied in a standard plastic nursery pot shown in the other pictures.