Knightia excelsa

RHS Plant Profile
New Zealand honeysuckle

Other common names

New Zealand oak, rewa-rewa

Trees

An evergreen tree with a narrowly conical habit, up to 30m high in its native environment but usually only 8-10m in cultivation. Young shoots are covered with red-brown felt, and young leaves are narrow and yellow-green, with coarsely serrated edges. Mature leaves are dark green, stiff and oblong-shaped. Dense spikes of small reddish flowers, with rolled petals and long styles, are produced from late spring to early summer, followed by woody brown seed pods

Position

Full sun, Partial shade

Soil Types

Clay, Loam, Sand

Max Height

8-12 metres

Max Spread

wider than 8 metres

Size

Time to Maturity
20–50 years
Max Spread
wider than 8 metres
Max Height
8-12 metres

Growing Conditions

Clay Loam Sand
Moisture
Moist but well–drained or Well–drained
pH
Acid or Neutral

Position

Full sun Partial shade
Aspect
South–facing or West–facing
Exposure
Sheltered
Hardiness
H1C

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Proteaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Columnar upright
Genus
A genus of evergreen trees native to New Zealand with leathery, toothed leaves and long, bright red flowers. Commonly known as 'Rewarewa', a Māori term, the flowers are a source of honey production
Name Status
Correct
Plant Range
New Zealand

How to Grow

Cultivation

Grow in fertile, well-drained, neutral to acid soil in full sun or light shade with shelter from cold winds. Some drought tolerance once established; will not tolerate waterlogging. Needs frost protection when young. A striking specimen tree for warmer regions

Propagation

Propagate by seed or by semi-ripe cuttings in summer; cuttings require bottom heat and may be slow to root

Suggested planting locations and garden types

  • Architectural

Pruning

Minimal pruning required, see pruning group 1

Pests

May be susceptible to thrips

Diseases

Generally disease-free