Thuja (Thuja spp.): General Information Common Name Thuja Scientific Name Thuja spp. Family Cupressaceae 2n 22 Type Coniferous, foliage plant Origin Asia and North America Uses Ornamental Landscape Gardening Browning in Thuja It is not caused by any pathogens or insect-pests. Winter-burn, water-stress and sun-burn are major cause. Low or high soil pH is also … Continue reading Browning in Thuja Plant