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Plant in the pot, not in the cup. Place the entire root ball in the pot so the plant crown is at the surface of the pot opening, not the cup opening. Mulch with mini-bark in each cup. Start with the bottom row of cups and add soil with each layer. Feed the plant through the holes from the inside of the pot. The cup holes are often too small to squeeze the root ball through the opening. I also add a little slow release fertilizer with each level. Take care to not have fertilizer in direct contact of roots.