Tuesday, October 25, 2011

Persian Shield, Perennial of The Day

Strobilanthes dyerianus
    Persian Shield

Type    Perennial
Hardy range    9A to 11
Height    24" to 4' / 60cm to 1.20m
Spread    36" to 6' / 90cm to 1.80m
Growth rate    Fast
Form    Irregular or sprawling and rounded
Exposure    Full shade
Persistence    Evergreen and semi-evergreen

Bloom Color    Purple
Bloom Time    Summer and Fall

Environment
This plant will grow in moist 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, purple, silvery and variegated
Fall Color    No change in fall color
This plant has attractive foliage.

Culture Notes
This tropical shrubby perennial is grown for its beautiful purple silver leaves.  Stem cuttings can be taken in the summer and rooted. Persian Shield graces the landscape with rich, purple and silver, variegated foliage in the shade.  Foliage bleaches to a less attractive, washed out silver when leaves are exposed to full sun after the noon hour.  Green stems emerge square, then develop a more rounded cross section as the base of the stems become woody latter in the year.  Purple flowers develop later in the summer and stand above the foliage, but they go largely unnoticed among the colorful foliage.  Plants reach about 4-feet-tall and slightly wider by the end of the first growing season.

Persian Shield can be used as a small shrub for next to the foundation, or in a shrub border to accent the area.  The foliage is sure to attract attention away from other parts of the yard.  It combines nicely with light-gray house siding.  Plant about 4-feet apart to allow for rapid growth.  It is a wonderful accent for the shaded landscape, but is not suited for planting in the full sun.  Morning sun appears to be fine afternoon sun causes extensive wilt.

In hardiness zone 8B and in the coldest parts of hardiness zone 9, winter temperatures often knock the plant to the ground, but warm weather in the spring brings the shrub back from the base of the stems.  Visitors to your garden will comment on this plant and ask for cuttings.  It is a very attractive plant.  Flowers develop later in the season.  They can be pinched off to help keep the plant growing.


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