Quercus palustris 'Pingreen' GREEN PILLAR®

Quercus palustris 'Pingreen'
Quercus palustris 'Pingreen' GREEN PILLAR®
pin oak
SIZE/TYPE taller shrub
USUAL HEIGHT 7-15m
USUAL WIDTH 1-3m
LEAVES deciduous broadleaf
COLOUR OF LEAVES green
FLOWERS insignificant or non-blooming
LOCATION full sun
SOIL TYPE acidic (peaty) to neutral
SOIL MOISTURE REQUIREMENTS evenly moist (dislikes drought)
USDA zone (lowest) 4   (down to -34°C)
WINTER PROTECTION  
FOR ZONE 5+6 Code of winter protection zone 5+6
FOR ZONE 7 Code of winter protection zone 7
BELONGS TO CATEGORIES Deciduous broadleaf
Rarities
Hedging plants
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It is always so nice to learn about a new plant that represents a smaller version of a large species just because many of us want to enjoy its features without having to fear that it will take up the whole of our garden. GREEN PILLAR® is one of them. It is a narrowly columnar variety of pin oak which keeps itself very slim – about 1m wide in about 10 years. Why would you go for this oak rather than the fastigiated form of English oak? The main difference are the typical pin oak leaves. They are deciduous, deeply lobed, and glossy. They emerge fresh green and retain its rich green colour until autumn when they change to fiery orange and red if cultivated in acid soil. The display of vibrant red shades on a slim tree makes a fantastic landscape feature.

GREEN PILLAR® was found and introduced by William Flemmer III from Princeton in New Jersey, USA, in 1994 as a consequent mutation of another variety called Crownright. It is patent protected, registered under No. PP9,093.

Pin oak will grow in almost any soil type, including chalky, but it will have the most spectacular autumn colours only in acid soil. Being also called swamp oak it will grow in moist and wet areas, too, but only if given enough time to establish in conditions that will not allow the transplanted root-ball remain water-logged before new roots are made. Hardy to about -34°C (USDA zone 4).

Last update: 11-02-2013
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NOT IN STOCK? WHY NOT TO TRY A SIMILAR ONE:
Quercus robur
Quercus x warei
Sorbus aucuparia
GLOSSARY
  • STANDARD QUALITY - Plants of this group are 1st class quality with number of branches and overall density adequate to their size and age, considering they were container grown.
  • DE LUXE QUALITY - This label guarantees a luxurious quality of manually selected plants that, compared to their height and age, are exceptionally dense and beautiful.
  • EXTRA - These plants are usually mature and bigger specimens with exceptional overall appearance.
  • STANDARD (as described in the plant form) means a tree with a trunk of 190-210 cm and a crown at the top, unless specified differently. The commercial size for trees is their girth measured in the height of 1m from ground.
  • HOBBY - These plants are of the same quality as our standard-quality plants but younger and therefore cheaper.
  • SHRUB - a woody plant with branches growing bushy from the ground level.
  • HALF-STANDARD or MINI-STANDARD - a small tree with shorter trunk, its size is usually specified.
  • FEATHERED - These are trees with branches growing already from the base of the trunk and up along the stem.
  • GRASSES and PERENNIALS - Sizes given usually read the diameter of the pot or the clump, as specified.
LARGE PLANTS over 150 cmspecimens, screening and hedging shrubs

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