General Information Common Name Mountain Hemlock Scientific Name Tsuga Mertensiana Sun Tolerance Full Sun Height 20 - 60 m (66 - 132 ft) Spread 10 - 15 m (33 - 50 ft) Growth Rate Fast Bloom Time Spring Color Green, Flower Color Yellow Type Tree Native USA, Europe. Classification Kingdom Plantae – Plants Subkingdom Tracheobionta – Vascular plants SuperdivisionSpermatophyta – Seed plants