Issai Fruiting Mulberry. The Japanese told us that this was a dwarf fruiting Mulberry found in some far off province of China. When I first saw a plant, it was only 18" high and probably had a quarter of cup of fruit on it. This is the perfect small fruiting tree for the home garden. The fruit are unusually large as well. Another superior characteristic of this plant is that it fruits with every flush of growth. I have seen fully three crops of fruit a year from it. I don't know the ultimate size, but my original plant is only about 4' high but over 6' wide. Grow in full sun for best fruit production.