For more information, visit: br Once you’ve decided the type of marijuana you to grow, your next task is to examine your seeds for signs of immaturity. An immature seed has a blended surface with grey or greenish colours and a soft shell. Premature seeds are generally smaller, whilst older seeds crack easily, lose water, and are lighter in color.br br Seeds that are dark brown and fully intact are most likely to germinate. For the germination process you will need a roll of paper towels, ziplock bags, purified water, and a nice warm place to put them.