My experience with using grocery store bought garlic is mixed. When it did work, it grew a lot of leaves but not the bulb. When I researched this, it’s because garlic requires specific soil conditions to grow its bulbs.

But bulb aside, garlic is a good natural critter repellent. It’s good to grow around lettuce and kale. Though I haven’t found a good cover plant to keep white butterflies away. Right now I’m using netting which they can sometimes find a way into.