Blackhaw (Viburnum prunifolium) is a deciduous flowering shrub or small tree that grows 12 to 15 feet tall with a rounded form. Grown in partial shade, blackhaw blooms with white flowers in April or May and produces berries in the fall. Viburnum seeds, because of their tough seed coat and dormancy period requirement, take over a year to germinate. Plant the blackhaw seed in the fall.
Combine 3 parts of pine bark and 1 part of sand and pour it into the planting pot. Run water over the planting medium until it is evenly moist and the water drains from the bottom of the pot.
Clean the seed by holding it under running water and removing all trace of the pulp. Use a soft toothbrush to scrub the seed, if necessary. Blot the seed dry on a paper towel.
Push the blackhaw seed 1 inch into the planting medium and cover it with the planting medium. Cover the pot with hardware cloth to protect the seed from wildlife. Place the pot outside in a shady area. Keep the soil moist at all times. Germination may take from one to two years.
Transplant the seedling when you see roots at the bottom of the pot. Use the pine bark and sand mixture that you used for germination and a 2-gallon planting pot.