Volume 1+
Price per plant £342.00
Price £342.00

All prices include VAT

Product description



Rocky Mountain Juniper is a species of juniper native to western North America. It grows at altitudes up to 2,500m (7,000ft) on dry soils, often together with other juniper species.

The cultivar Blue arrow is a very popular ornamental plant in gardens, grown for its very slender, strictly erect growth habit it will make a maximum of 2.5m(8ft) with striking steel blue foliage.

Where to grow

It grows well in most situations, as it is originally from an arid climate it does well on dry sites and does not like waterlogged ground.

Mature height
Very Small up to 5 metres
0-5 meters
Growth rate
Sun levels
Full sun
Difficulty/hard to grow
Moisture levels
Drought tolerant
Garden Tree
Small garden Tree
City/Urban Sites
Flower Arranging


For the continued healthy growth of your trees, shrubs or hedging it is vital that you follow the advice below.


The main reason that plants die within 12 months of having been planted is lack of water.  It is essential throughout the spring and summer, to give a heavy enough watering to enable the water to penetrate right down to the deepest root level of the tree.  In hot dry spells give the equivalent of 2 bucketfuls every three days.

Weed Control

One of the most common causes of lack of water is competition from grass.  When trees are first establishing, the grass roots would be at the same level as the tree roots and are far more efficient at taking up water and thus choke the tree.  It is vital for 3 years after planting that your tree or hedge has a circle or strip one  metre wide completely free of grass.  The way to eliminate grass in order of effectiveness is:

  1. Spray off the grass with a glyphosate based weed killer such as Roundup.  Apply each year for the first 3 years.  It is best applied when the tree is dormant as it is absorbed through green leaves and kills the plant off at the roots.
  2. Firmly fit a mulch mat around the base of the tree by tucking the edges into the soil and put a thick layer of bark mulch on top of this.  This can be done after the initial spraying with glyphosate and should avoid the need for further spraying.

Mowing or strimming is NOT an answer to the problem.  Each time you mow, the grass will grow back more vigorously and strimming invariably leads to lacerated trunks.


If trees are not correctly secured they will rock in the planting pit. Roots not firmly in contact with the soil are unable to take up moisture and nutrients, resulting in die back or death of the tree.  Check, particularly after windy weather, that stakes are still solidly in the ground keeping the base of the trunk firm.  The purpose of the stakes is to anchor the roots.   Flexing in the wind, higher up the trunk, is not necessarily a problem if the roots are firm.

Bellow is list of the correct system to use to secure your trees.

  • 40/60, 60/80, 80/100 whips - Unless rabbit/deer problem no need to stake.
  • 100/125, 125/150  1.2m Cane and Easi tie.
  • 150/175  1.2m square stake and a buckle tie and spacer.
  • 175/250, 6/8, 8/10 15L 1.65 Tree stake and a buckle tie and spacer.
  • All larger trees. 2 x 1.65 Tree stake and cross rail with 38mm cushion spacer and 1m of 38mm strapping.


Always use our recommended tree ties or strapping.  These are designed and manufactured with the correct amount of give to hold the tree firm without strangling it. They should be checked at the end of each growing season for adjustment as the trunk thickens.  Non proprietary materials such as baler twine will cut into the bark and should not be used.

Protection from Animal Damage

Rabbits, deer, sheep, cattle and horses can all potentially damage trees.  Ask us for advice on the most appropriate guards for your trees or hedge.  Squirrels are also a terrible pest when trees get to about 20ft tall but there is no protection available.


By Mark Baigent. on 20/08/2014

I’m confused, your info contradicts and it’s critical to my decision….
What is the mature height ??

Mature height - Very Small up to 5 metres.

The cultivar Blue arrow is a very popular ornamental plant in gardens, grown for its very slender, strictly erect growth habit it will make a maximum of 2.5metres (8ft) with striking steel blue foliage.

By Simon on 21/08/2014

Hello Mark,

Sorry it can be a little confusing. The Mature height - Very Small up to 5 metres is a general tree height classification that works in the following way:

Very Small - 0-5m
Small 5-10m
Medium 10-15m
Large 15-20m
Very Large 20m+

As there can be up to a 5m difference in this scale we have tried to be more precise in the description, thought trees can grow to different heights depending on soil conditions and sun levels.

So This Juniper Blue Arrow is classed as a very small tree and will normally grow to 2.5m maximum.

I hope this makes it clearer.

Kind regards,


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