Pinus jeffreyi aka Jeffrey Pine

Taxonomy

Pinus jeffreyi, also known as Jeffrey pine, Jeffrey's pine, yellow pine, and black pine, is a North American pine tree mainly found in California, as well as in the westernmost part of Nevada, southwestern Oregon, and northern Baja California. This large coniferous evergreen tree can reach heights of 25 to 40 meters, occasionally up to 53 meters. Its needle-like leaves are arranged in bundles of three, are stout, and have a glaucous gray-green color, measuring 12 to 23 centimeters in length. The dark purple cones, which ripen to a pale brown, are 12 to 24 centimeters long and have thinly woody scales with short, sharp inward-pointing barbs. The seeds are around 10 to 12 millimeters long and have a large wing of 15 to 25 millimeters. Pinus jeffreyi is closely related to Pinus ponderosa (ponderosa pine) and shares a similar appearance, but can be distinguished by its cones. The cone scale barbs of Pinus jeffreyi point inward, giving the cone a smooth feel when rubbed, while the barbs of Pinus ponderosa point outward, resulting in a prickly texture when touched. Additionally, the needles of Pinus jeffreyi are glaucous and less bright green, and the cones are stouter, heavier, and contain larger seeds with inward-pointing barbs.

Common names

Jeffrey Pine, Jeffrey's Pine, Black Pine

How to care for Jeffrey Pine

Difficulty

Jeffrey Pine presents a moderate level of care, which allows plant enthusiasts with some experience to expand their skills and knowledge.

Water

Jeffrey Pine should be watered regularly, allowing the soil to dry out between waterings.

Soil

Jeffrey Pine loves a well-draining soil. Perlite and vermiculite help with drainage, while coco coir adds organic matter, so a good potting soil mix will have all three. You can improve store-bought soil by adding some perlite to it.

Lighting

Jeffrey Pine thrives in bright and direct sunlight. To ensure your plant receives enough light to survive, place it less than one foot from a window. The current weather in your area may affect the placement in your home. For example, if you live in a region that has longer and more intense periods of sunlight, then you may want to place the plant farther away from the window to avoid direct sunlight and reduce the risk of sunburn. Alternatively, if you live in a region with relatively milder temperatures and less intense sunlight, then you may be able to place the plant closer to the window for increased exposure. Ultimately, the current weather in your area should be taken into consideration when determining the best placement for your Black Pine.

Toxicity

Ploi lacks confirmed information on the toxicity of this plant. If you, a relative, or your pet accidentally consume plant material with unknown toxicity, it's best to consult a medical expert.

Fertilizer

The Jeffrey Pine grows at a slow pace and doesn't require any supplementary fertilizers. By renewing its potting soil once a year, it should receive enough nourishment. Remember, plants obtain their energy from sunlight, not fertilizers.

Growth-pattern

Jeffrey Pine grows vertically and new growth emerges from the top of the plant.

Region of origin

Jeffrey Pine’s native range is South-western N. America - Oregon to California.


More info:
Wikipedia