Sea Urchin Miniature Eastern White Pine
Pinus strobus ‘Sea Urchin’ – North American Native Plant
Plant Details
USDA Plant Hardiness Zones: 3a-7b (8 in cool summer climates) Find Your Zone
Plant Type: Coniferous Evergreen Shrub
Height at Maturity: maybe 2′ in 10 years
Width at Maturity: maybe 2′ in 10 years
Spacing: Best as a specimen
Growth Habit / Form: Globe to Rounded Pyramid with age
Growth Rate: Slow; 2 inches per year
Flower Color: NA
Flower Size: NA
Flowering Period: NA
Flower Type: NA
Fragrant Flowers: No
Foliage Color: Soft Blue
Fragrant Foliage: Yes
Berries: No
Berry Color: NA
Sun Needs: Full Sun, Morning Sun with Afternoon Shade, Morning Shade with Afternoon Sun
Water Needs: Average
Soil Type: Clay (amend heavy clay to ensure good drainage), Loam, Sandy, Silty
Soil Moisture / Drainage: Moist But Well-Drained
Soil pH: 5.0 – 7.0 (Acid to Neutral)
Maintenance / Care: Very Low
Attracts: Visual Attention, Birds
Resistances: Cold Temperatures (-30F), Deer, Rabbit
Description
Of all the miniature Eastern White Pine we’ve seen or grown, Pinus strobus ‘Sea Urchin’ is hands down the finest. Like a sea urchin, it forms a perfect globe of needles in a soothing silvery-blue color. But, unlike a sea urchin the needles of this pine are soft and harmless, adding fantastic color and texture to the garden. Very slow growing, Sea Urchin might add 2 inches to its height and width per year being 2 to 3 feet tall and wide when all grown up. Its diminutive size makes it a perfect fit for miniature gardens and in containers. Plant near sitting areas where it is sure to be a conversation piece.
Sea Urchin was developed by a witches broom seedling at the University of Connecticut in the 1970s by Dr. Sydney Waxman and is his most popular introduction.
Landscape & Garden Uses
The Sea Urchin Eastern White Pine is ideal for use as a specimen in small rock gardens, conifer gardens, miniature gardens and Asian gardens. It is also suitable for containers. Also a nice accent in home foundation plantings near an entryway, patio or other sitting areas.
Suggested Spacing: Best as a specimen or in spaced groupings 3 feet or more apart
Growing Preferences
The Sea Urchin Eastern White Pine grows best in a moist but well-drained soil of average fertility and full sun, but will tolerate and appreciate some light afternoon shade in hot summer climates. As with so many other ornamental shrubs and trees, a constantly soggy soil can cause problems with the roots. Does not require pruning however can be trimmed annually in late winter to maintain a smaller plant or for very interesting topiary forms or bonsai. As with other densely branched dwarf conifers, we suggest a cleaning out of dead needles on an annual basis. Sometimes we carefully use a hand-held blower to get this job done. Eastern white pines prefer cool summer climates in USDA Zones 3 through 8.
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