How old would these be? I planted some last fall but very few came up. They don't show any sign of having berries on them
The berries or seeds will show up on plants at about 3 or 4 years old depending on how well they grow. Wild plants competing with other plants for nutrients may not be ready to pick untill 8 to 10 years old. If you are growing in a controlled enviroment such as weeding and fertilizing, root growth will be much faster and would get a faster return on your investment but the roots are not worth as much as wild or wild simulated root.