Planted these. They were on sale last week at the hardware store, half price. I wasn't going to buy any, but my cheap side prevailed. They are sold with a block of compressed "cour peat". I don't know if that is coir, processed to be like peat, or a mixture of coir plus peat, or peat plus coir. Also, I wonder if it's worthwhile planting them in the garden after blooming, to dig up and rebloom next year. It might be interesting to try.