Blue lily

Blue lily may refer to the following plant species:
 * Agapanthus praecox, native to South Africa and widely cultivated
 * Nymphaea caerulea (Blue Egyptian water lily or sacred blue lily), native to East Africa and widely cultivated
 * Nymphaea violacea, a species of waterlily native to northern Australia
 * Stypandra glauca (nodding blue lily), native to Australia
 * Thelionema caespitosum (tufted blue lily), native to Australia
 * Triteleia grandiflora, native to western North America