Buxus microphylla var. koreana
Korean Boxwood is a very hardy boxwood with excellent cold hardiness - makes a great choice for northern gardens. Has been noted to survive temperatures as low as -20F, and can be used in zone 4 locations, where most Boxwoods would fail. Leaves are much more elongated, and elliptic in shape than most other Boxwood cultivars that are commonly seen. Can also withstand the heat & humidity of the southeast - just a good hardy plant!!
Foliage will bronze slightly in extremely cold areas - the more exposure & less shelter that is provided, the more intense the winter bronzing will be displayed. Makes a great hedge, foundation planting - can be sheared / trimmed to be maintained at a wide variety of heights & widths.
Plant Facts & Specifications--Mature Height :
3 - 4 ft
--Mature Width :
4 - 5 ft
--Growth Rate :
Moderate ( 4" - 6" avg per yr )
--Hardiness Zones :
4 - 9 ( if unsure of your zone, please use zone finder below)
--Sun Exposure :
Full to partial sun - will even do very well in partial shade areas.
--Soil Preference :
Average. Slightly cool & moist - fertile. Mulching recommended.
--Foliage Color & Texture :
Evergreen broadleaf - extremely
bright, vibrant green. Leaves are more elongated, very elliptic &
oblong when compared to most other Boxwood cultivars. Foliage density
can be greatly enhanced through regular shearing / trimming if desired.
--Flower, Cone, Or Berry Facts :
Flowers - very
small, rather inconspicuous, creamy yellow flowers develop in small clusters in April - May,
and are actually quite fragrant for the brief time that they are
present. Will attract bees while in bloom.
--Diseases / Insects :
the more prevalent problems one might be confronted with when growing
Boxwood would be: Canker, root rot, boxwood leaf miner, boxwood
webworm, nematodes, and boxwood mites. Most all of these pests /
problems are much more commonly seen on Buxus sempervirens cultivars -
other variations / hybrids seem to show much more resistance to these
problems. Root rot ( Phytopthora ) can be a problem in inadequately
drained soils, and is usually indicated by a lighter "off color" to the
foliage. Annual treatment / inspection is strongly recommended during
the early growing season in order to monitor any possible problems, and
as a preventative action.
--Recommended Spacing :
A spacing of about 2 ft apart is recommended for most typical hedge applications.
--Deer Resistance Rating : Lowest Resistance [ 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 ] Highest Resistance
--Fertilization / Feeding :
For maximum health & hardiness, we highly recommend a good grade granular ( preferably organic ) fertilizer / plant food for use with all of our plant species. We personally use, and recommend the Espoma line of organic plant foods, as they are super effective yet gentle enough to use on even the most delicate of evergreen species where fertilizer burn would normally be a major concern. However, a water soluble type plant food (Miracle Gro, or equivalent ) are also acceptable options. Other granular fertilizers with a 6 - 12 - 12, or 10 - 10 - 10 ratio can also be used - but we suggest using them at 1/2 - 3/4 strength to avoid any chemical burn issues to the root system of the plants. Best to fertilize in early spring, and again in mid fall - avoid feeding standard chemical fertilizers during hot summer months, and directly after transplanting. The Espoma Organic Plant Foods may be used at anytime.