China is the world's top producer at 66% of world production of garlic. It is an annual crop that is planted in the fall and is harvested next May/June.
Chinese garlic has a shelf life up to nine months, hot taste and good price. Just about facts, garlic is a living organism, it cannot easily be shipped around the world; humidity, temperatures and airflow affects its storage life. Maintaining good postharvest quality requires all due care and attention, especially, before the end of dormancy it needs a cold storage in August/September results in high production costs. Certainly, supply and demand also makes price fluctuates always.