General Culture:
Grow in average, medium moisture, well-drained soils in full sun to part shade. Somewhat wide range of soil tolerance, but prefers moist, neutral to alkaline, well-drained loams. Intolerant of dry conditions. Best in full sun, but generally appreciates some light afternoon shade in hot summer climates such as the St. Louis area. Avoid full shade where foliage density will substantially decrease. Avoid exposed, windy sites. ‘Woodwardii’ is noted for retaining its globose form as it matures without pruning.
Noteworthy Characteristics:
Thuja occidentalis, commonly known as American arborvitae, Eastern arborvitae, Eastern white cedar or Northern white cedar, is a dense, conical to narrow-pyramidal (sometimes maturing to broad-pyramidal), often single-trunked, evergreen tree that is native to eastern and central Canada south to northern Illinois, Ohio and New York with scattered populations further south in the Appalachians to North Carolina. ‘Woodwardii’ is a compact globular-spreading form that typically grows to 4-5’ tall with a spread to 8’ wide over the first 10 years. It may eventually mature to 8-10’ tall and to 15’ wide. Plants display attractive scale-like rich green foliage in flattened sprays. Seed cones, if present, are not particularly showy.
Problems:
No serious insect or disease problems. Leaf blight may cause some foliage to spot and drop. Watch for canker. Leaf miner may damage leaf tips. Bagworms, mealybug, scales and spider mites are occasional visitors. Foliage may show some winter burn (turns yellow-brown) in exposed sites. Susceptible to damage/stem breakage in winter from ice and snow accumulations.
Uses:
Foundations, rock gardens, boundaries and low hedge. Specimen/accent.
© Missouri Botanical
Garden, 2001-2010
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