How to make a Sub-Irrigated Planter. I'm not sure I would use a two liter plastic bottle though. Over time I would fear the plastic breaking down enough to poison the plant. Perhaps a wine bottle instead.
Renowned for being one of the most fragrant flowers around, gardenia is a lovely, but tricky houseplant. Test Garden Tip: Keep your gardenia happy by periodically using a fertilizer formulated for acid-loving plants such as azaleas