Grow a Coulter Pine Tree from Seed for a massive pine cones. The outstanding characteristic of this tree seed is its production of the largest cones of any pine species in the world, weighting 5-8 lb. each. Seed cones mature in 2 years after pollination, with a massive, heavy ovoid-cylindrical cone with upcurved claws when developed. Pinus coulteri are planted for their drought 🏜tolerant nature in parks, and large gardens.