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Dwarf Colorado Blue Spruce PICEA PUNGENS GLAUCA GLOBOSA

Description & features

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Product description

Characteristics

Glauca Globosa is a dwarf, globe-shaped, blue-needled, evergreen shrub with a flattened top that will slowly grow over time to1.2 metres (4ft) tall and to  1.5 metres (5ft) wide. The blue needles hold their color well throughout the year, but are brightest when they first emerge in spring.

Where to grow

Easily grown in average medium moisture humus rich, well-drained soils in full sun.

Did you know?

Picea pungens is very variable in the degree of glaucousness (Blue bloom) of its needles.  A batch of seedlings will have many shades.  The most striking with blue or silvery leaves have been perpetuated by grafting and named.  The oldest known clone descends from a tree that grew in Professor Sargent’s garden at Harvard.  This tree came from seeds sent by Charles Parry who collected the them from Colorada in 1861.  Cuttings came to the UK with Anthony Waterer during a visit to the Arnold Arboretum in 1877 and distributed by the Knapp Hill Nursery.
 

 

Features

Mature height
Very Small up to 5 metres
Spread
0-5 metres
Shape / habit
Round Headed
Growth rate
Very Slow
Soil type
All soil types
Difficulty / hard to grow
Medium
Evergreen / Deciduous
Evergreen
Season of interest
Winter
Summer
Leaf
Silver/Blue
Foliage
Dense
Uses
Garden Tree
Small garden Tree
City/Urban Sites
Flower Arranging

Features

Mature height
Very Small up to 5 metres
Spread
0-5 metres
Shape / habit
Round Headed
Growth rate
Very Slow
Soil type
All soil types
Difficulty / hard to grow
Medium
Evergreen / Deciduous
Evergreen
Season of interest
Winter
Summer
Leaf
Silver/Blue
Foliage
Dense
Uses
Garden Tree
Small garden Tree
City/Urban Sites
Flower Arranging

Aftercare

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

Watering

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.

Staking

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.

Ties

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.


Comments

By Mrs. sharon reid on 17/04/2015

Is it best to remove cones from a blue spruce as it grows or leave them on?

By Roy berry on 30/04/2015

My Picea pungent glaucoma GLOBOSA Iis looking a bit faded. It is losing its blueness. Should I be feeding it.

By Simon on 01/05/2015

Hello,

It is really up to you, if you like the look of the cones you can leave them on. Otherwise you can just prune them off.

By Simon on 01/05/2015

Hello Roy,

If it is in the ground there should be no need to feed it. If it is in a pot it could do with feeding or potting up once a year.

By sue franklin on 21/07/2015

Exactly what do I grown my Picea Pungens Glauca globosa in is it econacia or any grow bag soil.  I am putting it into a pot.

By Simon on 04/08/2015

Hello Sue,

A soil-based compost would probably be best, such as John Innes No3. It does not require ericaceous compost.

By K Gray on 30/08/2016

I have a picea pungens globosa in a large container which now has the needles going brown from the bottom of the stem and gradually advancing towards the tip of the stem.
After investigation I find that this can occurs in Aug through wet humid temps and what is termed Stress and fungii called Rhizosphaera kalkhoffil and Stigmina attack the shrub. I found that a product called Daconil is used in the US but am unable to find it from anywhere in the UK It has the active ingredient Chlorothalonil in it.  Has anyone else had this problem? On a larger Picea pungens shrub which is in the ground, this had it about 2 years ago but the product I used then is no longer available. I do not want to loose this shrub so can anyone help please

By Simon on 31/08/2016

Hello K Gray,

Would you be able to send a picture of your Picea to .(JavaScript must be enabled to view this email address)? It would also be useful to know when it was planted in the container and how often you water it.

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