Agapanthus likes full sun and great drainage. I have seen this summer flowering bulb do well in partial shade but good drainage is a must. It sounds like you also are asking about how to plant a mum. If you are thinking of Chrysanthemums, these are also plants that love full sun and good drainage. Chrysanthemums are not bulbs however and can be more easily divided when the clumps become too crowded. Keep growing, Marianne Binetti