Tuesday, December 14, 2010

White Pine, Evergreen Shrub Of The Day

Pinus strobus 'Pendula'
White Pine, Eastern White Pine

Type Shrub, woody plant
Hardy range 3B to 7A
Height 10' to 15' / 3.00m to 4.60m
Spread 25' to 30' / 7.60m to 9.20m
Growth rate Slow
Form Weeping
Exposure Partial shade or partial sun to full sun
Persistence Evergreen

Bloom Color Pink and yellow
Bloom Time Spring

Environment This plant tolerates some drought.
This plant will grow in dry soil.
Suitable soil is well-drained/loamy or sandy.
The pH preference is an acidic to neutral (less than 6.8 to 7.2) soil.

Leaf Color Blue and green
Fall Color No change in fall color
This plant has fragrant foliage.

Culture Notes White pine is a traditional favorite in northern landscapes that grows well in situations mimicking its native habitat. Unfortunately, few urban sites match this criteria. Try to provide loose loamy, acidic, moist soil with adequate organic matter. Young White Pines are quite tolerant of half-day shade while mature White Pines prefer a sunny location. They grow poorly and develop chlorosis and die on clay soil. Sites with an alkaline pH also causes decline. Trees appear to have little tolerance for drought, soil compaction and heat. Eastern White Pine suffers from application of roadside deicing salts and is sensitive to air pollution, especially ozone and sulfur dioxide.


Trees are probably best suited for zone 6B and north. Trees transplant easily but allow plenty of open soil space for root development. Trees perform poorly in restricted soil spaces. Needles in fascicles of 5.

Maintain adequate mulch areaBe sure to clear all turf away from beneath the branches and mulch to the drip line (the edge of the branches), especially on young trees, to reduce competition with turf and weeds. This will allow roots to become well established and keep plants healthier. Locate the tree properly, taking into account the ultimate size, since the tree looks best if it is not pruned to control size. The tree can enhance any landscape with its delightful spring flush of foliage. It can be the centerpiece of your landscape if properly located.

Like most pines, trees best recover from transplanting when moved balled and burlapped, not bare-root. They also grow fine when planted from containers provided plants are not root bound.
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.

Please feel free to comment on any post at any time. All feedback is welcome and we’d love to receive all of your thoughts.

Thank You

Friday, December 10, 2010

Mugo Pine, Evergreen Shrub Of The Day

Pinus mugo 'Valley Cushion'
Mugo Pine, Mountain Pine

Type Shrub, groundcover, woody plant
Hardy range 2A to 7A
\Height 24" to 36" / 60cm to 90cm
Spread 5' to 8' / 1.60m to 2.40m
Growth rate Slow
Form Rounded and spreading or horizontal
Exposure Partial shade or partial sun to full sun
Persistence Evergreen

Bloom Color Yellow

Environment This plant tolerates some drought and salt well.
This plant will grow in 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 Green
Fall Color No change in fall color
This plant has fragrant foliage.

Culture Notes Trees best recover from transplanting when moved balled and burlapped, not bare-root. It performs remarkably well on soils with a high pH and is fairly well adapted to urban sites. Plant size and density can be controlled by pinching the elongating candles just before or as the needles begin emerging but this is usually not needed on Mugo Pine since growth is very dense. Needles are in twos.
Like most pines, trees best recover from transplanting when moved balled and burlapped, not bare-root. They also grow fine when planted from containers provided plants are not root bound.

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.


 Please feel free to comment on any post at any time. All feedback is welcome and we’d love to receive all of your thoughts.

Thank You

Thursday, December 9, 2010

Banana Shrub, Evergreen Tree Of The Day

Michelia doltsopa x figo 'Allspice'
Banana Shrub, Sweet Michelia
Type Tree, woody plant
Hardy range 8B to 10A
Height 15' to 30' / 4.60m to 9.20m
Spread 12' to 25' / 3.60m to 7.60m
Growth rate Average
Form Oval and upright or erect
Exposure Partial shade or partial sun to full sun
Persistence Evergreen

Bloom Color White
Bloom Time Spring
The flowers are fragrant and showy.

Environment This plant tolerates some drought and a little salt.
This plant will grow in dry soil.
Suitable soil is well-drained/loamy, sandy or clay.
The pH preference is an acidic to neutral (less than 6.8 to 7.2) soil.

Leaf Color Green
Fall Color No change in fall color

Culture Notes Scales are the biggest problem with growing this plant. You are almost sure to have a heavy scale infestation on the leaves with this plant and plants eventually look terrible. This makes it a questionable choice. Flower buds are damaged by cold as they begin to enlarge in response to warm winter temperatures in my garden (southern zone 8B) almost every year. When weather is consistently cold all winter, flow buds expand and break open to show nice, fragrant, creamy white flowers.

    This selection of Banana Shrub is a dense, upright, evergreen shrub when young that eventually forms a rounded canopy. Leaf size is about half way between the two parents. It has lustrous, dark green foliage with thick brown hairs on the underside. Brown hairs cover the green twigs so densely that twigs appear brown. The fragrant, 1 to 1 1/2 -inch-diameter, light-yellow flowers are edged in maroon and are magnolia-like in appearance. They last from late winter until spring and have a very interesting fragrance; they smell like ripening cantaloupes or bananas. This smell can be very pleasant but can be overwhelming when these shrubs are massed together. The bark of the Banana Shrub becomes a dark grayish-brown color with age.

    Banana Shrub is generally used as a specimen and foundation plant and is well suited for planting in a large container or raised planter. Older plants can be trained into small, multi-trunked trees that eventually take on a vase shape.

    Banana Shrub prefers a well-drained, acid, organic soil that is of medium fertility and moisture. It grows well in full sun to a mostly shaded location. Shaded plants grow taller than sun grown plants and develop a central leader with little pruning; whereas, sun grown plants often develop several trunks with a rounded canopy.


    Maintain adequate mulch areaClear all turf away from beneath the branches and mulch to the drip line, especially on young trees, to reduce competition with turf and weeds. This will allow roots to become well established and keep plants healthier. Prune the tree so trunks and branches will not rub each other. Remove some secondary branches on main branches with included bark. This reduces the likelihood of the main branch splitting from the tree later when it has grown to become an important part of the landscape. Locate the tree properly, taking into account the ultimate size, since the tree looks best if it is not pruned to control size. The tree can enhance any landscape with its delightful spring flush of foliage. It can be the centerpiece of your landscape if properly located.
Tree establishment specificationsChoose good quality trees for planting. The most common cause of young tree failure is planting too deep. In most instances, the point where the top-most root in the root ball originates from the trunk (referred to as the root flare zone or root collar) should be located just above the soil surface. You may have to dig into the root ball to find the root flare. If there is nursery soil over this area, scrape it off. Never place ANY soil over the root ball. The planting hole should be at least twice the width of the root ball, preferably wider because roots grow best in loose soil. In all but exceptional circumstances where the soil is very poor, extensive research clearly shows that there is no need to incorporate any amendments into the backfill soil. Simply use the loosened soil that came out of the planting hole. Simply planting with the topmost portion of the root ball slightly higher than the surrounding soil might still install the tree too deep - be sure to locate the root flare.


    Weed suppression during establishment is essential. Apply a 3-inch thick layer of mulch to at least a six-foot diameter circle around the tree. This area should be at least two feet in diameter for each inch of tree trunk diameter and maintained during the establishment period. Apply a thinner layer of mulch directly over the root ball but keep it at least 10 inches from the trunk. This allows rainwater, irrigation and air to easily enter the root ball and keeps the trunk dry. Placing mulch against the trunk and 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 after planting encourages rapid root growth that is essential for tree establishment. Trees provided with regular irrigation through the first growing season after transplanting require about 3 months (hardiness zones 9-11), 6 months (hardiness zones 7-8), or one year or more (hardiness zones 2-6) per inch of trunk diameter to fully establish roots in the landscape soil. Trees in desert climates may take longer to establish. Trees that are under-irrigated during this establishment period (and most trees are) often require additional time to establish because roots grow more slowly. Be prepared to irrigate through the entire establishment period, especially during periods of drought.

    Irrigation also helps maintain and encourage the desirable dominant leader in the tree canopy on large-maturing trees. Instead of a dominant leader, trees that are under-irrigated during the establishment period often develop undesirable, low, co-dominant stems and double leaders that can split from the tree later.


    Unlike established plants, which do best with deep, infrequent irrigation, research clearly shows that recently transplanted trees and shrubs establish quickest with light, frequent irrigation. For trees planted in spring or summer, provide one (cooler hardiness zones) to three irrigations (warmer hardiness zones) each week during the first few months after planting. Daily irrigation in the warmest hardiness zones provides the quickest establishment. Following the initial few months of frequent irrigation, provide weekly irrigation until plants are fully established. With every irrigation, apply one (cool climates) to two (warm climates) gallons of water per inch trunk diameter (e.g. 2 to 4 gallons for a 2-inch tree) over the root ball only. In most landscapes that receive more than 30 inches of rain or irrigation annually, if the mulch area is maintained weed-free, irrigation does not need to be applied outside of the root ball. Never add water if the root ball is saturated.

    In cooler hardiness zones, in all but the driest years, irrigation of spring- and summer-planted trees usually can be discontinued once fall color has begun. Irrigation of fall planted trees, however, should be continued until foliage has dropped from the deciduous trees in the region. In warmer climates, irrigate fall-and winter-planted trees as described for the spring- and summer-planted trees.

    In drier, desert climates there is benefit to be gained from applying additional irrigation outside of the root ball area. This is best done by making a large diameter berm four to six inches high, then filling it with water so it percolates into the soil. For the first two years, irrigate twice each week through the spring, once per week in summer provided monsoons arrive, and twice each week again in fall if it remains warm. Taper off watering to once or twice each month in winter and resume twice weekly next spring. For years three to five, water twice per month in spring, summer, and fall and once or twice per month in winter. During years five through seven, water once every three weeks in warm weather and once every six weeks in winter. After this, the drought-tolerant desert trees should be able to survive on natural rainfall.

    Trees with good, strong structure need no pruning at planting, except to remove broken twigs. Do not remove branches to compensate for root loss - research has shown that this can be detrimental to establishment.



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Please feel free to comment on any post at any time. All feedback is welcome and we’d love to receive all of your thoughts.