Smaragd arborvitae plants

Western arborvitae 'Smaragd' plants This tall cypress-family cultivar is valued for its regular conical shape, rich emerald foliage and easy care. It retains its green colour even in severe cold. Lifespan is 100–150 years depending on conditions, and it looks tidy with little intervention. Available plant heights: 50–250 cm. Prefers sun, warmth, clean air and shelter from wind. A southern position protected from north winds by buildings or tall hedges is suitable; partial shade is acceptable. It may survive extreme conditions but develop poorly. Soil should be loose, well-drained and contain sufficient sand. A 15–20 cm layer of gravel or expanded clay is recommended, especially in heavy clay. Liming is suggested. The original planting instructions recommend a few centimetres of wood ash at the bottom and placing the plant on a mound so roots do not touch the base; after settling, the root collar should remain visible and is stated not to be buried beyond half its length. The hole should be considerably larger than the root ball: 1 m in diameter and depth, or 70 cm in light soils. The soil mixture is turf soil and peat at 2:1. Remove the pot or wrapping only immediately before planting because exposed roots dry quickly. Spring is preferred. The original text warns against autumn planting of Golden Smaragd and suggests thick mulch and a light-transmitting shelter if autumn planting is undertaken. Mineral feeding is recommended 3–4 times annually for young and mature plants. Drought is poorly tolerated. Water weekly in dry soil without rain. Where groundwater sufficiently moistens the root zone, the source suggests no more than twice monthly. It recommends gradually reducing water in autumn and stopping during rain. Before cold weather, mineral fertiliser and mulch are suggested; plants up to two years old may be covered with light fabric. Preserve the root ball when transplanting. Roots lie close to the surface, so loosening should not exceed 10 cm. Peat mulch reduces summer evaporation and protects roots from winter freezing.