Hello Uli, According to Encyclopedia of Cape Bulbs, A. maxima flowers August to November. Plants 40 - 150 cm high, flowers nodding, white with green keels. Grows rocky sandstone or granitic soils, Namaqualand to Riversdale. Mine has yet to bloom, going on second year from seed. The bulbs are quite vigorous and almost the size of a golf ball now. Linda Okotoks, AB Canada