Sources from Georgia piedmont and the southern edge of the range produced the least volume per tree at 15 years. Seeds collected from large, continuous populations would be a better choice for most planting sites. It is the only named southern pine hybrid. Hybrids are easy to locate in nurserybeds since the hybrid does not have a grass stage and will be taller at lifting than pure longleaf. Hybirds of longleaf and slash pine can occur in southern Georgia and in northern Florida where pollen release may occur at the same time.
Hybrids resemble longleaf more than slash.
Tree Improvement Tree breeding efforts in longleaf pine are less advanced than for pulpwood species such as loblolly or slash. With a few exceptions, solid wood companies generally have not invested much monies into genetic improvement of longleaf. However, due to low seed yields, longleaf orchards are not producing an excess of seed. Therefore, woods-run seed are still being used since the demand for seedlings is greater than the availability of improved seed. When growing seedlings in containers, often two seed are used per cavity.