The branches are long and slender, swaying in the wind,[5] spreading or curved downward, not pendulous, forming a rounded, dense or more open crown.

[5] The needles are (7-)9-13(-15) cm x 1-1.2mm bright lustrous green,[8] bundled in threes and with a short basal sheath.

[5] In its native environment Pinus greggii begins flower and cone production at approximately 4 to 5 years of age.

[11] Pinus greggii is found in Mexico in the Sierra Madre Oriental, only in a limited area in the states of Coahuila, Nuevo León and Hidalgo.

It occurs somewhat farther north than its close relative, Pinus patula, both ranges overlap slightly.

In its natural habitat Pinus greggiii grows in the cool highlands, at altitudes between 1300 – 2600 m; in the northern part of its distribution at 2300 – 2700m.

[5] It is nowhere abundant in its scattered range, and always occurred mixed with e.g. Quercus, Platanus, Liquidambar, Fraxinus, and other pines, like Pinus patula, P. pseudostrobus, P. teocote, P. montezumae, and P. arizonica var.

stormiae; with P. cembroides and Juniperus flaccida on dry sites; and at higher and more mesic locations with Abies vejarii, Pseudotsuga menziesii or Cupressus lusitanica.

Trials from both northern and southern populations were carried out in Brazil, Colombia, New Zealand, South Africa, and Zimbabwe in the late 1980s.