Wednesday, February 5, 2014

Bar Harbor Creeping Juniper Featured Plant of The Day


Juniperus horizontalis 'Bar Harbor'
Creeping Juniper

Type    Groundcover, woody plant
Hardy range    4A to 9A
Height    2" to 4" / 5cm to 10cm
Spread    36" to 6' / 90cm to 1.80m
Growth rate    Average
Form    Prostrate and spreading or horizontal
Exposure    Full sun
Persistence    Evergreen

Environment
This plant tolerates drought and some salt.
This plant will grow in very dry soil.
Suitable soil is well-drained/loamy, sandy or clay.
The pH preference is an acidic to alkaline (less than 6.8 to more than 7.7) soil.

Leaf Color    Blue and green
Fall Color    Purple
This plant has attractive fall colors and fragrant foliage.

Culture Notes
'Bar Harbor' Juniper makes a fine-textured, dense, slow growing ground cover comprised of bright blue foliage. Foliage changes to a darker, reddish blue during the winter but new growth in the spring emerges blue.

Natural habitat is dry and windy with full sun exposure.  It looks best in an open site with no shade during the day.  This allows the foliage to dry quickly in the morning and helps prevent foliage disease from thinning the canopy.  A well-drained soil is essential for good growth.  Wet soil rots the roots and causes plant decline.

The plant is excellent for low-maintenance landscapes as it requires virtually no pruning, except along the borders of the mass planting as it reaches the edge of the landscape bed.  It is one of the best plants for cascading over a wall as the stems hug the contort of the wall.  It has also been tried as a hanging basket.  When used as a ground cover plant 3 to 4 feet apart.

`Bar Harbor' Juniper tolerates exposed sites and a wide range of soils.  Full sun makes for the most dense canopy of foliage.  It will grow in partial shade but may become thin and allow weeds to germinate in the landscape bed.  Once established, Juniper is quite drought-tolerant.  The plant is excellent for low-maintenance landscapes as it requires virtually no pruning.  When used as a ground cover plant 3 to 4 feet apart. The plant grows about 2 to 4 inches tall. 'Bar Harbor' is a female so it generates no allergy-causing pollen.

Planting and establishing shrubs

The most common cause of young plant failure is planting too deep.  Plant the root ball no deeper than it was in the nursery.  In most instances, the root flare zone (point where the top-most root in the root ball originates from the trunk) should be located just above the landscape soil surface. Sometimes plants come from the nursery with soil over the root flare. If there is soil over this area, scrape it off.  The planting hole should be at least twice the width of the root ball, preferably wider.  In all but exceptional circumstances where the soil is very poor, there is no need to incorporate anything into the backfill soil except the loosened soil that came out of the planting hole.  Never place ANY soil over the root ball. If a row or grouping of plants is to be installed, excavating or loosening the soil in the entire bed and incorporating organic matter enhances root growth and establishment rate.

Weed suppression during establishment is essential.  Apply a 3-inch thick layer of mulch around the plant to help control weed growth.  Keep it at least 10 inches from the trunk.  If you apply it over the root ball, apply only a one or two inch layer.   This allows rainwater and air to easily enter the root ball and keeps the trunk dry.  Placing mulch against the trunk or applying too thick a layer above the root ball can kill the plant by oxygen starvation, death of bark, stem and root diseases, prevention of hardening off for winter, vole and other rodent damage to the trunk, keeping soil too wet, or repelling water.  Regular irrigation through the first growing season after planting encourages rapid root growth, which is essential for quick plant establishment.


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