Pinus jeffreyi

Bloom Color: Yellow. Main Bloom Time: Early spring, Late spring, Mid spring. Form: Oval, Pyramidal.

Pinus jeffreyi is an evergreen Tree growing to 25 m by 6 m at a medium rate.
It is hardy to zone 8. It is in leaf all year, and the seeds ripen from January to February. The species is monoecious and is pollinated by Wind. The plant is not self-fertile.
Suitable for: light and medium soils, prefers well-drained soil and can grow in nutritionally poor soil. Suitable pH: acid and neutral soils. It cannot grow in the shade. It prefers dry or moist soil and can tolerate drought.

Industrial Crop: Hydrocarbon Management: Standard Regional Timber
Landscape Uses:Aggressive surface roots possible, Specimen. Succeeds in most soils, but prefers a light well-drained sandy or gravelly loam. Dislikes poorly drained moorland soils. Established plants tolerate drought. This species is not hardy in the colder areas of the country, it tolerates temperatures down to between -5 and -10°c. A very ornamental plant. It is often short-lived in Britain but is moderately fast growing with some trees reaching a height of 15 metres in 29 years. A long-lived tree in the wild, specimens 500 years old are known. It commences bearing seeds when about 10 - 15 years old, though good production does not commence until twice that age. Leaf secretions inhibit the germination of seeds, thereby inhibiting the growth of other plants below the tree. Plants are strongly outbreeding, self-fertilized seed usually grows poorly. They hybridize freely with other members of this genus. Closely related to P. ponderosa, and hybridizes with it in the wild. Some of the earlier plantings under this name in Britain have turned out to be P. ponderosa. The cones are 12 - 35cm long, they open and shed their seed whilst still attached to the tree. The resin from broken shoots has a very strong lemon scent. Plants in this genus are notably susceptible to honey fungus. Special Features:
Attractive foliage, North American native, Inconspicuous flowers or blooms. The plant is heat tolerant in zones 8 through 6. .
At this temperature, many plants begin to suffer physiological damage. Heat Zones range from 1 to 12 .
For example Heat Zone. 11-1 indicates that the plant is heat tolerant in zones 11 through 1.) For polyculture design as well as the above-ground architecture information on the habit and root pattern is also useful and given here if available. The plant growth habit is a standard with a non-suckering single trunk . An evergreen. The root pattern is a tap root similar to a carrot going directly down .