I bought a cantua hotpants in a 4 inch pot about 8 years ago and the plant has done real well (7 feet tall and healthy-looking), but it has never flowered. It gets about 6 hours of direct sun in the middle of the day and normal water. Someone suggested that it might not like fertilizer,although I wasn't overfertilizing it, so I stopped fertilizing entirely about 4 months ago. No change. Any ideas? It has never had any freeze damage.