All American Selections winner. Black Olive is a beautiful multi-use ornamental plant. Its fruits are dark purple and turn red as it matures. The red fruit combined with the dark purple foliage and bright purple flowers are spectacular and will add an excellent array of color to your garden. Harvest in 80 days. Germination rate about 80% or better. David’s Garden Seeds is a Veteran owned business that has been offering quality seeds since 2009.