Answer: The very best route is to plant your hollies in clay or plastic pots with adequate drainage holes in them and sink those pots into your decorative fiberglass pots. You can fill the bottoms of the fiberglass pots with styrofoam peanuts, or other material and set the utilitarian pots on top, then camouflage the tops with spaghnum moss. This way your hollies will have healthy root systems and you can show them off in your decorative fiberglass containers. When it's time to water your plants, just pull them out of the fiberglass, water as needed and after the excess water drains, set them back into the fiberglass pots.
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