Pyramidalis Compacta

Source Data

Thuja occidentalis Smaragd, Northern & eastern white cedar, Arborvitae Smaragd tree, Evergreen coniferous tree (lat. Thuja occidentalis Smaragd).

A variety of Western thuja (Thuja occidentalis). At the age of 10 years , the height of plants is about 2.5 m . The height of adult plants is 4-6 m, the crown diameter is 1-1.8 m. It grows slowly. The annual increase in height is about 10 cm, in width about 4 cm.

The crown is cone-shaped, narrowly conical, of medium density, branches weakly. The shoots are arranged in a vertical plane. The twigs are located relatively far from each other, glossy, light green in summer and winter. It lends itself well to pruning.

The leaves are scaly, fresh green, bright, shiny. Lateral leaves with a straight back, a straight and sharp tip and a straight edge. Facies leaves with a blunt tip and a small, almost imperceptible gland on the back. Leaves of growth shoots with needle-like tips and more noticeable glands on the back. Stomatal stripes are yellow in the form of blurred spots. There are no rosary-shaped shoots. The cones are rare oblong-ovate, brown, about 1 cm long.

It grows well in suburban areas, tolerates the gas pollution of the city limits. One of the best conical varieties of thuja, characterized by moderate growth.

It is recommended to plant in places illuminated by the sun, in shade or partial shade. It is undemanding to soils. Winter hardiness. Shade tolerant. It is recommended for group and single plantings, hedges.

Instructions

1. Growing Thuja compacta - Pyramidalis Compacta (Thuja occidentalis) from seed is a rewarding process. Follow these guidelines for best results.
2. Seed Preparation: Soak seeds in warm water for 12–24 hours before sowing to soften the seed coat. Discard any floating seeds as they are likely non-viable.
3. Sowing: Sow seeds 0.5–1 cm deep in well-draining seed compost mixed with sharp sand or perlite. Water gently and keep in a cold frame or unheated greenhouse at 18–22°C.
4. Germination: Seeds may germinate over 2–8 weeks depending on species. Some conifers require a warm period (20°C for 4 weeks) followed by cold stratification before germination will occur.
5. Transplanting: Transplant seedlings into individual pots once they have 2–3 pairs of true leaves. Harden off gradually over 7–10 days before planting in final position. Space according to the mature size of the species.
6. Aftercare: Keep soil evenly moist, especially during the first growing season. Apply a layer of mulch around the base to retain moisture and suppress weeds. Protect from strong winds until established.
7. Hardiness: Hardy in most temperate climates. Suitable for USDA zones 4–8 depending on species. Established plants can tolerate winter temperatures well below freezing.

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