RST Environmental Solutions Ltd

You are here: /Services /Treeline


TreeLine has a number of different Poplar and Willow tree species available for sale. They are suitable for shelter belts, soil conservation and bio-engineering and a range of other applications. We are able to design systems to retain slips. We can deliver to most areas in the North Island. If you want further information on any species please contact us.

Poplar and Willow poles are usually harvested at the beginning of June and finish at the end of August while the trees are dormant for winter. 

TreeLine is a division of RST Environmental Solutions.

Poplar and Willow Research Trust


Chinese Poplar Crowsnest
Chinese Poplar

A useful deciduous shade or screen tree in parks or large gardens. Forms a conical crown. Rapid growth and wide-spreading roots, prefers a deep moist soil. Shiny tapered leaves, bright green above, greenish-white beneath, slightly red veins and red branchlets. Will reach 10-20m in height.


A narrow formed tree with a very straight main leader. It is similar to the Lombardy Poplar with its many small branched growing upward and close to the stem. However, at maturity it may not be quite as narrow as Lombardy. The leaves flush reddish bronze in late September, contrasting sharply with the light coloured bark and giving a very attractive appearance. 

Kawa Shinsei
P. deltoides x yunnanensis

Kawa has a narrow crown and is possum resistant. An excellent conservation tree on moist slopes in areas that don't get excessive wind. New leaf emerges late September with greenish/bronze leaves. Kawa is one of the densest poplars at up to 360kg per cubic metre making it the leading timber producing poplar. It is also a good firewood tree planted in a block at 2x3 metres on a valley floor. Keeps its foliage longer than the x euramericana hybrids in winter as illustrated in this photograph.
P. deltoids x manimowiczii

A narrow form tree, Shinsei develops its heaviest branches at the whorl and does not produce very heavy limbs. It has good possum resistance. The leaves are a dark green, thicker and more wind tolerant than the x euramericana types. This is good clone for inland moist sites.
Tasman Toa 
P. deltoids x nigra

Tasman is a narrow tree when young but does develop some heavier limbs from the whorl with age. It is not as large as Revo which was the first rust resistant x euramricana released in New Zealand. Tasman shows some rust resistance. Not recommended for shelter-belts in horticultural situations as it grows too large.
P. x euramericana x yunnanensis

Toa is a broader tree than Kawa and it's heavier in the trunk but is still a narrow tree. Also an excellent conservation tree in inland areas with good moisture. The leaves of Toa are like those of x euramricana hybrids, but of a darker green. Toa carries a lot more leaf with a denser crown.
Veronese Weraiti 
P. deltoids x nigra

Veronese is a x euramricana hybrid black poplar, imported from Italy. A good straight-stemmed and narrow crowned tree. It has small leaves similar to Tasman, and good drought and wind tolerance. It is prone to rust in areas of high humidity and heavy dews in western areas when planted in low lying situations.
P. deltoids x nigra

Weraiti has a good shaped crown with a heavier stem than most previously covered new hybrids. It will produce a few heavier branches but not to the extent of Argyle. It is another hybrid that is doing well in the eastern North Island areas.