Woody > Pinus > Pinus strobus > Pinus strobus
Pinus strobus
White Pine
Mike's
Opinion
"
Pinus strobus is the provincial tree of Ontario. Tom Thompson of the Group of Seven often painted this majestic tree and made it famous for its wind blown appearance.
Michael Pascoe, NDP., ODH., CLT., MSc. (Plant Conservation)
"
| Family |
| Pinaceae |
| Genus |
| Pinus |
| Species |
| strobus |
| Category |
| Woody |
| Type |
| Tree (evergreen) |
| Pronunciation |
| USDA Hardiness Zone |
| 3 - 8 |
| Canadian Hardiness Zone |
| 1a - 6b |
| RHS Hardiness Zone |
| H5 - H7 |
| Temperature (°C) |
| -40 - (-15) |
| Temperature (°F) |
| -40 - 5 |
| Height |
| 15 - 25 m |
| Spread |
| 7 - 14 m |
Photographs
-1.JPG "A native stand in the French River district, Ontario.")
Cultivars
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Description and Growing Information
Flowering Period
| General Description |
| The older it grows the more windswept it looks. |
| Cultivation |
| Prefers moist sandy loam in full sunlight although seedlings are shade tolerant until about 20 years old. |
| Shape |
| Conical in its youth with a flatter top at maturity. |
| Growth |
| Fast |
| ID Characteristic |
| The only pine native to Eastern North America with five needles. |
| Pests |
| The White Pine blister rust, web worm, saw fly, European pine beetle, White Pine weevil can be minor problems. |
| Habitat |
| Anywhere from rocky ridges to sphagnum bogs to dry sandy soils. |
| Bark/Stem Description |
| Fissured, at maturity and silver in colour often with heavy resin deposits where branches have been removed or broken. In its youth the bark in often light green, but turns grey-brown and scaly with age. |
| Flower/Leaf Bud Description |
| The buds are red-brown in colour with overlapping scales and are sharply pointed to 15 mm long. |
| Leaf Description |
| Soft and flexible with five, 12 cm needles per fascicle that persist for one to four years: blue green with white dots. |
| Flower Description |
| Small, yellow male strobili cluster at the base of the first year's growth; light brown female strobili turn woody once mature, cones are 8-20 cm long and are often slightly curved. |
| Fruit Description |
| Cones are roughly 15 cm in length, pointed, course, narrow, and resinous. Yellow-green and turning to light brown in September when the cones mature and then drop from the plant during the autumn and winter months. |
| Colour Description |
| Blue-green needles with silver bark and resin deposits covering almost all parts of the plant. |
| Notable Specimens |
| The A.M. Cuddy Gardens, Strathroy, Ontario, Canada. The Niagara Parks Botanical Gardens, Niagara Falls Ontario, Canada and The Royal Botanical Gardens, Burlington, Ontario, Canada. |
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