What's the difference between garlic seedlings, green garlic and green onions? What is the difference? Garlic seedlings are the kind of garlic that grows. Green garlic and green garlic are the kind of garlic that has just grown. Garlic clapping in July is the kind of onion that is stupid enough to rush into the ground and grow one after another, and six white dew will move. So there is a difference between the three.