Use a high-quality indoor potting soil mix. Follow the directions on the seed packet or plant your starter as you would for any other type of plant. Dampen the soil after planting. As your plants begin to grow, give the pots a 90 degree-turn once a week to keep them growing evenly.
In the wild raccoons average 2-3 years as many are killed by disease, car accidents, hunting and predation. In captivity they may live 15 years or more.
I've seen some 50 pound raccoons, but most are in the 25-30 pound range as a 2-3 year old raccoon. In the first year of a raccoons life, it grows quickly. Usually getting into the 20 pound range. Then it will gain size more slowly as time goes on.