Wednesday, April 14, 2010

Perennial Of The Day

Dicentra spectabilis 'Alba'
Common Bleeding Heart, Japanese Bleeding Heart
Type Perennial
Hardy range 3A to 9A
Height 18" to 24" / 45cm to 60cm
Spread 36" / 90cm
Growth rate Average
Form Irregular or sprawling
Exposure Full shade to partial sun
Persistence Deciduous

Bloom Color White
Bloom Time Spring and Summer


Environment This plant will grow in moist soil.
Suitable soil is well-drained/loamy.
The pH preference is a neutral soil.

Leaf Color Green

This plant has attractive foliage.
Culture Notes D. spectabilis flowers up earlier in the season than D. eximia, but then the foliage dies back soon after blooming. When planted in the shade garden with other Dicentra, it will seed itself. Once established, this plant does not like to be disturbed. Division of the tuber should be done in the early spring. Plant goes well with: Astilbe, Cimicifuga, Hosta, Rodgersia, and Chelone sp.

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Tuesday, April 13, 2010

Deciduous Shrub Of The Day

Weigela florida 'Brigela (French Lace™)'
Old Fashioned Weigela, Rose Weigela

Type Shrub, woody plant
Hardy range 4B to 8A
Height 24" to 4' / 60cm to 1.20m
Spread 24" to 4' / 60cm to 1.20m
Growth rate Slow
Form Rounded, upright or erect and vase shaped
Exposure Full sun
Persistence Deciduous

Bloom Color Red
Bloom Time Spring

The flowers are very showy.

Environment This plant tolerates some drought.
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, variegated and yellow
Fall Color No change in fall color

This plant has attractive foliage.

Culture Notes Weigela grows best in a sunny location and moist soil. Shaded plants are straggly. Weigela also dislikes crowding. The growth rate is moderate and the shrub transplants well, reaching a mature height and spread of only 2 to 4 feet. Some annual dieback and winter injury make annual pruning necessary. It is best to perform any needed pruning immediately after they have flowered. Canadian cultivars (the so called Dance cultivars) are the most cold hardy. Plants suffer in the deep south eastern part of the US. This plant is considered mostly allergy free and causes little or no allergy problems in most people.

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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Tuesday, April 6, 2010

Perennial Of The Day

Alstroemeria x 'Sweet Laura'
Lily of the Incas, Peruvian Lily
Type Perennial
Hardy range 7A to 10B
Height 24" to 36" / 60cm to 90cm
Spread 12" to 24" / 30cm to 60cm
Growth rate Fast
Form Upright or erect
Exposure Partial shade or partial sun to full sun
Persistence Deciduous

Bloom Color Yellow
Bloom Time Summer and Fall

The flowers are fragrant, showy and suitable for cut flowers.

Environment This plant will grow in moist soil.
Suitable soil is well-drained/loamy.
The pH preference is a neutral soil.

Leaf Color Green

This plant has attractive foliage.

Culture Notes The roots of this plant can become invasive. In hot summer climates, plant in partial shade. These plants do not do well in dry soil. In cold winter climates, mulch in the winter. In zone 7a, the plant should be removed in autumn and stored for spring planting. 'Sweet Laura' is one of the hardiest of the Peruvian Lilies. It has vigorous growth and blooming traits, and bears gorgeous yellow flowers that are spotted reddish-orange at the tips of its petals. Asexual propagation of this plant is prohibited.

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Thursday, April 1, 2010

Perennial Of The Day

Houttuynia cordata
Chameleon Plant, Rainbow Plant
Type Perennial
Hardy range 6A to 11
Height 6" to 12" / 15cm to 30cm
Growth rate Fast
Form Spreading or horizontal, upright or erect and variable spread
Exposure Partial shade or partial sun to full sun
Persistence Deciduous

Bloom Color White
Bloom Time Summer

Environment This plant tolerates occasional wetness.
This plant will grow in moist to wet soil.
Suitable soil is well-drained/loamy.
The pH preference is a neutral soil.

Leaf Color Green, pink and variegated

This plant has attractive foliage and fragrant foliage.

Culture Notes This plant will spread quickly, often growing through the bottoms of containers. It is not picky about growing conditions. If planted by the waterside, it will grow into the water.

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Tuesday, March 30, 2010

Deciduous Shrub Of The Day

Hydrangea macrophylla syn. Hydrangea hortensis; Hydrangea opuloides 'Laciniata'
Bigleaf Hydrangea, Florist's Hydrangea

Type Shrub, woody plant
Hardy range 5B to 9A
Height 4' to 6' / 1.20m to 1.80m
Spread 6' to 8' / 1.80m to 2.40m
Growth rate Average
Form Rounded
Exposure Full shade to partial sun
Persistence Deciduous

Bloom Color Blue, pink and white
Bloom Time Spring and Summer

The flowers are very showy.

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

Leaf Color Green
Fall Color No change in fall color

Culture Notes Since the deciduous Bigleaf Hydrangea blooms on large buds formed on previous season's growth, any pruning should be done immediately after flowering. Long popular as a florist's plant, Bigleaf Hydrangea performs well in moist, rich garden soil in partial sun to fairly deep shade, where it can grow 4 to 6 feet tall. Be sure that tree roots are not competing with the roots, since this will slow growth dramatically. Flowers are bluish in acid soil, pink in neutral.

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