Siberian pine, Pinus sibirica, is a popular ornamental tree in parks and large gardens where the climate is really cold, giving steady though not fast growth on a wide range of sites. It is very tolerant of severe winter cold, hardy down to at least –60 °C, and also of wind exposure.
Pinus sibirica is a member of the white pine group, Pinus subgenus Strobus, and like all members of that group, the leaves ('needles') are in fascicles (bundles) of five, with a deciduous sheath. They are 5–10 cm long. Siberian pine cones are 5–9 cm long. The 9–12 mm long seeds have only a vestigial wing and are dispersed by spotted nutcrackers.
Siberian pine is treated as a variety or subspecies of the very similar Swiss pine (Pinus cembra) by some botanists. It differs in having slightly larger cones, and needles with three resin canals instead of two in Swiss pine.
Like other European and Asian white pines, Siberian pine is very resistant to white pine blister rust (Cronartium ribicola). This fungal disease was accidentally introduced from Europe into North America, where it has caused severe mortality in the American native white pines in many areas, notably the closely related whitebark pine. Siberian pine is of great value for research into hybridisation and genetic modification to develop rust resistance in these species.
Info source: http://en.wikipedia.org/wiki/Pinus_sibirica
Genus - Pinus
Species - Cembra
Common name - Siberian Pine
Pre-Treatment - Required
Hardiness zones - 1 - 7
Height - 30-100' / 9 - 30 m
Spread - 20-40' / 6 - 12 m
Plant type - Tree
Vegetation type - Evergreen
Exposure - Full sun to Partial shade
Growth rate - Slow
Soil PH - Acid, neutral
Soil type - Loam, Sand, Well Drained
Water requirements - Dry or moist soil, can tolerate drought
Landscape uses - A popular ornamental tree in parks and large gardens
Leaf / Flower color - Green / --
|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 30-60 days 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. Re-pot 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.