III by H. Rabinowitch and D. Brewster. Allium cepa can be planted thickly and harvested immature for this purpose. Allium fistulosum is a perennial widely cultivated throughout the world, from Siberia to tropical Asia. It produces long cylindrical plants. There are dividing and non-dividing types.
Many varieties are available in catalogs.
It is still used a little today, but the seed is expensive and hard to produce. One can identify the species by looking carefully at the bottom of the green leaves near where they turn white. Onions are daylength sensitive. Red color intensifies with colder weather. Green onion seed numbers approximately 9,500 per ounce.