Volume 1+
Price per plant £54.00
Price £54.00
Volume 1+
Price per plant £120.00
Price £120.00

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 Skyrocket is a very popular ornamental plant in gardens, grown for its very slender, strictly erect growth habit it will make a maximum of 5m(15ft) with lovely blue/grey 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.

Its narrow conical habit, blue leaves and relatively small ultimate height make it a suitable screening tree for small gardens.

Mature height
Very Small up to 5 metres
0-5 meters
Growth rate
Soil type
All soil types
Sun levels
Full sun
Difficulty/hard to grow
Season of interest
Evergreen Hedge
Moisture levels
Drought tolerant
Good at altitude
Garden Tree
Small garden Tree
City/Urban Sites
Wind break


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 Mrs A Bell on 25/10/2013

We are looking to buy the above tree and wondered if we could plant it at this time of year
Thank you

By Simon on 25/10/2013

Hello Mrs A Bell,

Yes you can plant container plants at any time of year.

By Colin on 26/04/2014

We have a patio and wonder if the Blue Pencil juniper would be happy to stay in a container and if so would it periodically require repotting?

By Simon on 29/04/2014

Hello Colin,

You can keep Junipers in containers, thought you are correct in thinking that they would need potting on every couple or years or so. It would also be necessary to feed them a couple of times a year.

Kind regards,


By Adrian on 22/04/2015

Is it possible to keep the height of a blue pencil juniper to about 3.5m without the foliage appearing brown/woody.I trimmed an ornamental conifer 2 years ago and where I cut back beyond the green foliage it remained brown/woody. Can you recommend an evergreen height 3-4m,spread 1-1.5m max?

By James on 27/04/2015

we have a very windy garden on Anglesey some 5 miles from the coast, do you expect windburn in this situation?

By Simon on 01/05/2015

Hello Adrian,

It is possible to keep it trimmed to a height, but the trick it so keep it trimmed and not have to cut back into the old wood. So if you gave it a light trim twice a year it should be easily possible.

By Simon on 01/05/2015

Hello James,

It is a very hardy plant, but it is hard to know without seeing the site. My advise would be to look at other conifers in the area and see how they are doing.

By Barry on 28/11/2015

Hi, could you tell me what the differences are between this and the blue arrow variety please. I see skyrocket grows a bit bigger but many people online seem to think blue arrow is the better choice - more resistant to being bent by snow and disease, less prone to get ragged with age etc. Wondered what your thoughts were.
Many thanks

By Simon on 30/11/2015

Hello Barry,

Both Skyrocket and Blue Arrow make excellent narrow trees, but the newer introduction, Blue Arrow, is said to be somewhat denser than Skyrocket. It can be difficult to tell the difference between the two.

By Pav on 26/12/2015

How wide is the 30 Litre pot size tree when buying these?

By Simon on 06/01/2016

Dear Pav,

They are approximately 50cm across at their widest point, near to the base.

By julia on 22/02/2016

How far do the roots spread on these trees. Would it be sensible to plant about 3 metres
away from our house?

By Simon on 25/02/2016

Dear Julia,

As Juniper Skyrocket is slow growing and a fairly small tree, the roots are not invasive. Three metres away should be fine.

By Nancy on 06/05/2016

Juniper Skyrocket: would 1m be too close to a building?

By Simon on 20/05/2016

Hello Nancy,

There are numerous factors involved in the effect of tree roots on structures including soil type and type of construction. It is therefore difficult to say whether 1m would be too close. As a rule of thumb, plant at least half the ultimate height of the tree away from any structures you are concerned about.

By Ciara mckenna on 01/11/2016

We are looking at purchasing a 10ft skyrocket. We are in the KT4 area. Can you please tell me the price including delivery and whether you would plant it in position on delivery ?
Thank you

By Simon on 04/11/2016

Dear Ciara,

Delivery rates are on the coloured map here: I’m afraid delivery does not include a planting service, but is kerbside drop off only. We carry out planting near the nursery (just south of Bristol) but not as far away as KT postcodes.

Reviews, Comments and Questions

Your data will be used to display your comment, get in touch if you'd like to edit/remove it. You can find out more details in our Privacy Policy.