The Chir Pine, Pinus roxburghii, named after William Roxburgh, is a pine native to the Himalaya.
The range extends from northern Pakistan and northern Republic of India, Nepal, Bhutan.
It generally occurs at lower altitudes than other pines in the Himalaya, from 500-2000 m, occasionally up to 2,300 metres
Pinus roxburghii is a large tree reaching 30-50 m with a trunk diameter of up to 2 m, exceptionally 3 m. The bark is red-brown, thick and deeply fissured at the base of the trunk, thinner and flaky in the upper crown. The leaves are needle-like, in fascicles of three, very slender, 20-35 cm long, and distinctly yellowish green. (source: wikipedia.org)
Genus - Pinus
Species - Roxburghii
Common name - Chir pine
Pre-Treatment - Required
Hardiness zones - 8 - 10
Height - 50'-150' / 15 - 45 m
Spread - 10'-20' / 3 - 6 m
Plant type - Tree
Vegetation type - Evergreen
Exposure - Full Sun
Growth rate - Medium
Soil PH - Acidic, Neutral, Alkaline
Soil type - Clay, laom, Sand, well drained
Water requirements - Average Water
Landscape uses - Feature Plant, Shade Trees, Street Trees
Germination rate - 87%
Leaf / Flower color - Green / --
|Germination||1. Place the seeds in a container with tepid water and soak them for 24 hours. Change the water and wait another 24 hours.|
2. Put the seeds in a small plastic bag and cover with damp sand. Place the bag holding the seeds in the refrigerator for one to two months to stratify the seeds, which is preserving seeds in layers of moisture-laden peat, soil or sand. Check the sand and water as needed to maintain moisture. Don't allow the seeds to get soaked.
3. Fill small pots with compost. Place one or two pine seeds on top of the compost in each pot, then cover the seeds with a thin layer of sand.
4. Water the sand and compost to add moisture, then place the pots in a warm, sunny location. As the seedlings emerge and grow, the soil needs to remain moist, not wet.
5. Repot the pine trees into medium-sized pots in the fall. Grow them in the pots for the following season until they are large and strong enough for transplanting into the landscape.