Posted: 18/03/2014 at 19:29
Keeping young agapanthus plants in pots for at least the first few years will get them flowering quicker. I grow Headbourne Hybrids (from seed and then from self-produced seed) and they are as tough as old boots, but they do usually lose all top growth in the Winter. One of them doesn't though - natural variation (they are hybrids after all.) Whether they are evergreen or not depends on where you are. Once they become large plants and are planted into borders, do be aware that they can be quite thuggish with thick fleshy roots which reach far beyond the top growth and can 'mug' nearby plants. I have removed some of my larger ones because of this and now recommend they are grown in pots unless you have a large garden and can let them do their thing.
Having said that, there are a lot of other cultivars - take a look at Woottens who carry a large range and have good descriptions.