I bought a large JWP tree (Pinus Parviflora Glauca) and there were a bunch of opened cones in there with some ripe seeds. I would like to plant them using a tested method since I only have a few seeds.
Looking on the internet I found these instructions but I’m unsure if this will work (assuming the seeds are good). Has anyone here had any success growing white pines from seeds?
From SFGate - How to Grow White Pines From Seeds
Float the seeds in a bucket of water overnight to determine which are viable. Discard any seeds that float since their embryo is likely dead. Drain off the water and remove the seeds that sank.
Place the seeds in a freezer bag filled with lightly moistened perlite. Store them in the refrigerator for two to three months. Remoisten the perlite whenever it feels mostly dry.
After the cold stratification period has ended, fill 5-inch square pots with a mixture of half sharp sand and half milled sphagnum moss. Saturate the mixture with water and let it drain off.
Sow one white pine seed in each container. Poke a 3/4-inch-deep hole in the growing mixture. Set the seed inside horizontally and cover it with loose sphagnum moss. Spread a 1/8-inch-thick layer of sand over the sphagnum.
Place the growing containers outdoors in a greenhouse or inside a cold frame with insulated glass. Warm the pots with a propagation mat set to 70 F at night and 85 F during the day.
Probe the growing mixture every day to test the moisture level. Add water whenever it feels barely moist in the top inch. Water slowly until a small amount of moisture trickles from the bottom of the pot.
Watch for germination in two to six weeks. Leave the propagation mat in place but only turn it on at night. Set the temperature to 65 F. Continue to water whenever the growing mixture feels dry in the top inch.