Spring Onion has a dark green hollow-tubed leaves and a white bulb. They are a versatile vegetable that is popular in Asian cuisines. An excellent source of vitamin C and dietary fibre, this vegetable is available year-round in Thailand. Spring onions belong to the same family of vegetables as garlic, leeks and chives. The Straightleaf is the main variety of spring onion found in supermarkets and fresh food markets. Other selections of this variety include the Dynasty Winter King and Summer King.