Juniperus scopulorum 'Blue Arrow'
Overall Height: 120 - 140cm (inc. pot)
Full sun or partial shade
Well drained soil
Juniperus Scopulorum is more commonly known as Blue Rocky Mountain Juniper or 'Blue Arrow'. This common name is contrived from the conifers structure which has tight blue foliage and a tight columnar habit. This rigid, arrow-like shape and distinctive structure make this conifer a popular statement piece for growth along boarders and fences. The Juniperus Scopulorum can grow to around 2.5m depending on conditions and has a relatively narrow spread of just 0.5-1m when fully mature (full growth can take between 20 and 50 years).
The Rocky Mountain Juniper is fully hardy and require very little, if any maintenance. This conifer is perfect for growth in the UK, being hardy to temperatures below 20 degrees and capable of dealing with virtually everything the changeable British weather can throw at it. In addition, Juniperus Scopulorum can be grown in full or partial sun and required no shelter from wind or other elements. No pruning is required and the Blue Arrow can be grown in virtually any soil type including chalk, clay, sand and loam (although it does prefer a well-drained soil).
Juniperus Scopulorum is a great choice for anyone who want to achieve year-round structure and colour but with little-to-no maintenance required.
The RHS have awarded this conifer with an Award of Garden Merit (AGM). The ultimate height over 20 years is 1.5-2M. In a container it will stay smaller.
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Situation Open Close
: Juniper ‘Blue arrow’ is the ultimate low maintenance plant! It’s happy in full sun or partial shade and virtually any soil type providing it’s not waterlogged. It can be grown successfully in a container but will remain small and put on very little growth. If a container is the option then be sure to plant in a mixture of John Innes No3 and multi-purpose compost, making sure there are sufficient drainage holes.
Junipers are fully hardy, however a large amount of snowfall could damage the shape of the tree, simply give the tree a good shake to remove any snow.
Feeding and Watering Open Close
Feeding is not necessary for ground grown plants, but it is advisable to feed on a regular basis if in a container. Feed with a general-purpose fertilizer such as Vitax Q4 once a month in the growing season Apr-July.
If planted in a container make sure the tree is well watered during the growing season, as the roots cannot search for water like they do in the ground, especially if planted in terracotta as this bakes the soil in summer. In the first year of planting, trees in the ground need to be kept well watered too, however once established they can tolerate some small periods of drought but prefer to be watered occasionally.
Pest control and pruning Open Close
Generally pest free, however junipers can sometimes be attacked by aphids or Juniper scale, if this is the case then treat with the appropriate pesticide or organic preparation.
You will be pleased to know that ‘Blue Arrow’ requires little if any pruning, if needed then prune in late spring-summer. As with other coniferous plants just a light pruning of the outer foliage, as they will not shoot from old wood.