Sugar Maple (seed pkg)

Stratification of tree seed occurs naturally outdoors through the winter. Sow 6 mm deep, directly outdoors late fall. Sowing tree seeds outdoors in the fall takes advantage of this natural effect. To stratify indoors, mix the seed with a moistened, sterile, peat based growing medium in a container, wrap in a ventilated bag, and place it in a refrigerator for 12 to 20 weeks. In the spring plant the seed in a sheltered spot outside to grow into seedlings.

Another method: Cold stratify the seed: mix scarified seed into a sterile, moistened peat moss based potting soil. Cover with lid or wrap in a plastic bag and freeze solid for two months. Remove lid/plastic. Place under lights for germination at 23° C. Germination is sporadic.

Transplant to permanent site when well rooted.