Pinus strobus 'Sea Urchin' is a miniature selection of eastern white pine grown for its tightly rounded, sea-urchin-like form and soft, blue-green needles. You can use it as a compact evergreen accent in foundation beds, rock gardens, conifer collections, or large containers where year-round structure matters.

Give it full sun for the densest habit, but it will also handle partial shade, especially where summers are warm. Over time it typically reaches about 24-36 inches tall with a spread around 36-48 inches, forming a low, globe-shaped mound that stays neat with little pruning.

Plant it in moist, well-drained soil and water regularly during establishment. Once rooted in, it performs best with consistent moisture (not soggy conditions) and a mulch layer that moderates soil temperature and conserves moisture. In windy sites, a bit of shelter helps prevent drying winter winds from stressing foliage.

Little maintenance is needed beyond removing occasional dead interior twigs and keeping the root zone evenly moist in prolonged dry spells. With its slow growth and naturally compact branching, this cultivar is an easy way to add an evergreen focal point in cold-winter landscapes (USDA zones 3-8).

Specifications

• Cold hardiness zone: 3-8 (-40 degrees F) - Contact your local extension to confirm hardiness if you are in a fringe zone (we cannot guarantee hardiness in fringe zones)
• Light: Full sun   Part sun
• Mature height: 24-36"
• Spread: 36-48"
• Evergreen: Yes

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