Hello, I started a Melianthus (honey bush) from seed this past spring. It has reached about 4-5' in height. My question is about overwintering it this winter. It is stated that it falls into Zone 7b? I have it a pot. Was thinking about keeping it in a cool greenhouse? Has anyone overwintered one? This one has not yet flowered. I understand that it will probably die back to the ground level and regrow from the base the following year. Any info. would be appreciated.