Yes, white garlic is edible. It's a common and delicious ingredient used in various cuisines around the world.
Garlic bulbs, including those that appear white, can be sliced and added to salads or used as both a vegetable and a flavoring agent in cooked dishes. These bulbs are typically harvested in mid-summer once the plant dies down, and they can be stored for six months or longer. The bulbs themselves generally range from 10-20mm in diameter.
In addition to the bulbs, the flowers of some garlic varieties are also edible, both raw and cooked.