Last year, I fed them about every 2 months trying so hard to get them to bloom. This year, I will definitely feed them in March ( if I can wait that long). After March, I will see what the growth and bloom season is like. it shouldn't be long before I can take them out of the greenhouse for the spring. It was so pretty today, I wanted to do it now. I resisted the urge though. I have lots of new growth and many babies to pot up in June.