Pollination of most species is done by the pronuba moth. The yucca is entirely dependent on this moth and vice-versa. The seeds are black, flat and look like little wafers. They usually occur in great numbers. This is a very hardy, durable plant.
Plants are susceptible to leaf-spotting fungi during wet periods.
Too much moisture may result in black areas on the leaf margins. Black aphids on flower stalks may ruin the flowers. The leaves have long, loose fibers at the edges. The stems of the leaves do not rise above ground level. During the growing season, a long stalk will grow up to 6 feet and produce a large number of white, bell-shaped, lightly fragrant flowers.