If the growth of the trees goes well, you can sometimes even plant more than one tree per year. You lift the Groasis Waterboxx® plant cocoon off the tree as soon as you see that the branches really start to grow fast. This is the sign the tree gives you that he is not growing anymore from the water in the Groasis Waterboxx® plant cocoon, but that he found water deep in the soil. In most circumstances, we find that the tree is independent from the Waterboxx® plant cocoon after 9 months. You then lift it, replace the wick with a new one, and use the Groasis Waterboxx® plant cocoon for the next tree.