Royal Frost® Birch Tree

Royal Frost® Birch is an upright, pyramidal hybrid with purple-bronze foliage and showy white bark. Its cultivar denomination is ‘Penci-2’; [J. Frank Schmidt & Son](https://jfschmidt.com/all-trees/trees/royal-frost-birch/) identifies it as a ‘Crimson Frost’ × ‘Whitespire’ hybrid, while [North Carolina Extension](https://plants.ces.ncsu.edu/plants/betula-royal-frost/common-name/royal-frost-birch/) provides growing guidance and notes sensitivity to hot, humid summers. ## Landscape use Plant as a specimen where the bark, dark leaves, and upright form can be appreciated. [J. Frank Schmidt](https://jfschmidt.com/all-trees/trees/royal-frost-birch/) lists 40 feet tall by 25 feet wide; [North Carolina Extension](https://plants.ces.ncsu.edu/plants/betula-royal-frost/common-name/royal-frost-birch/) reports 30–40 feet high and 15–20 feet wide, and the [Royal Horticultural Society](https://www.rhs.org.uk/plants/374785/betula-pendula-royal-frost/details) lists 8–12 m high with a potentially wider spread. ## Siting and soil Full sun produces the strongest purple leaf color; partial afternoon shade can help in hot summer climates. Provide moist, acidic, well-drained soil and keep the root zone cool with mulch. North Carolina Extension cautions that heat and humidity can stress this birch, so it is best suited to cooler northern climates. ## Seasonal interest The purple-bronze foliage contrasts with the white trunk, then shifts toward yellow-orange to reddish tones in autumn. Catkins appear in spring, though the tree is chiefly valued for its foliage and bark. ## Maintenance Keep soil consistently moist, especially during establishment and dry weather. Prune only when necessary and do so during dormancy; avoid late-winter or spring pruning while sap is running. Monitor stressed trees for birch borer and leaf problems.