Onion is one of the most important vegetable crops in the Philippines. Tens of thousands of hectares are planted to onion (after rice) in Nueva Ecija and Ilocos regions alone excluding Nueva Vizcaya and Occidental Mindoro.

Bulb onion ((Allium cepa L.), locally known as sibuyas, is probably the most indispensable culinary ingredient in the world. Another kind of onion is what is known as shallots (Allium ascalonicum L.) or locally known as sibuyas tagalog. Onion is a favorite seasoning, and its pungent aroma and sharp taste makes it ideal for spicing up meat, salads and vegetable dishes and as toppings for pizza. It is also used to cure a wide array of physiological disorders such as cough, obesity, insomnia, hemorrhoid and constipation. (Occidental Mindoro Onion VCA)