Tuesday, November 16, 2010

Siberian Arborvitae Evergreen Shrub Of The Day

Thuja occidentalis 'Minuta'
Eastern Arborvitae, American Arborvitae, Siberian Arborvitae, Northern White Cedar, White Cedar
Type Shrub, woody plant
Hardy range 2A to 7B
Height 24" to 4' / 60cm to 1.20m
Spread 5' to 6' / 1.60m to 1.80m
Growth rate Slow
Form Rounded
Exposure Partial shade or partial sun to full sun
Persistence Evergreen

Bloom Color Yellow
Bloom Time Spring

Environment This plant tolerates some drought, flooding and a little salt.
This plant will grow in dry to wet or submerged 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 Green
Fall Color No change in fall color

Culture Notes Transplanting is moderately easy if plants are root-pruned and either balled and burlapped or potted. White-Cedar likes high humidity and tolerates wet soils and some drought, but not salt exposure of any kind. The foliage turns brownish in winter, especially on cultivars with colored foliage and on exposed sites open to the wind. Many of the natural stands in the United States have been cut. Some remain in isolated areas along rivers throughout the East.
Foliage turns brown with the onset of cold winter temperatures. Some of the cultivars, including this one, retain their green foliage well into winter.

Planting and establishing shrubsThe 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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