Answer: Agapanthus can be difficult to keep long term as a container plant in a climate where it has to be brought indoors for the winter. The best I can suggest is that you be sure to feed and water it generously as long as it is outdoors and growing actively, the idea being to give it as much energy as possible so it can build up enought strength to bloom. Use a complete slow release or water soluble fertilizer (with micronutrients) per the label directions -- at the heavier suggestged rate. An occasional topdressing of good quality compost can also be helpful. It should be in a generously sized container as well. Finally, the more weeks of natural sun it receives, the better. To extend the growing season, you might try moving it outside on nice days in early spring and late fall then bringing it indoors at night to protect it from the more extreme cold. Using a container on rollers can make this easier to do. To avoid shocking it by temperature extremes, keep it in a relatively cool but bright indoor place during the winter. I hope this helps!
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