Garlic is an ingredient used to make Totems at Zecora's Hut in the Everfree Forest and was added in the Everfree Forest update. It looks like a long green leaves like a real garlic plant, But when it's ready it will show a yellowish garlic.
Up to 5 may be held at any given time. They can be bought directly at Zecora's Hut for 4 if there is not enough for your mixture. It can create some of the moderate totems.