harvey, i did not mark the time i put it in place, but for some reason, after I put in the tall cup, iwraped with aluminum foil, and it was high enough in the tree to get som sun. i'd think it took about 5-6 weeks. i have others that istarted earlier but are not done yet, including one i started last fall. i opened and it has strong thick spikes, so, it will fill up quickly. i Also tie the branch down, so,the portion below the layer is giving me more side branches. it is like reconstructing the poor tree.