Cultivation and Uses
Agapanthus africanus can be grown within USDA plant hardiness zones 9 to 11. In lower-numbered zones, the bulbs should be placed deeper in the soil and mulched well in the fall. Agapanthus can be propagated by dividing the bulbs or by seeds. The seeds of most varieties are fertile.
Several hundred cultivars and hybrids are cultivated as garden and landscape plants. Several are winter-hardy to USDA Zone 7. Two cultivars have gained the Royal Horticultural Society's Award of Garden Merit, A. campanulatus subsp. patens, and 'Loch Hope'.
In some regions, one or more species of Agapanthus are invasive plant species. In New Zealand Agapanthus praecox is classed as an "environmental weed" and calls to have it added to the National Pest Plant Accord have encountered opposition from gardeners.
In popular culture, Mr. and Mrs. Dursley were growing Agapanthus in their yard in Harry Potter and the Half Blood Prince.
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