'Planting Stock/Small Commercials' (Hemerocallis)
Any bulb which blooms is "mature."
These are the backbone of a commercial lily field; bulb size is 12 to 14 cm in circumference, about the size of a walnut in the shell. If planted very early in the spring, a small portion of Oriental bulbs will be large enough in size by the Mid October harvest to make B&D Lilies' Premium-sizeŠ, but most need to be left for another season of growth.
Most Asiatic bulbs in this grade of "small commercial" will be mature enough for 3 to 5 flowers when planted in the garden. Orientals are rarely sold this small, usually being too small to produce more than one flower.