James Waddick asked whether anyone on PBS grow and flower this with success. I do not have ‘Regina’ – I have the ordinary 3’-leaf variety. I’ve been growing it in a large pot for many years, so I don’t know what mix I used when potting it originally. It has been happily producing abundantly flowered scapes every summer. It gets morning sun, but I've read that it's a forest plant, so I’m going to try moving it to a shadier position this year. I give it a very dilute solution of fertilizer with micronutrients every watering. For micronutrients, I use Dr. Earth Micronutrient Plant Food – the directions indicate how much to use monthly; I divided that recommendation by 30, and use it every watering, which in the summer can be every two days or even every day. Be advised: snails love it.