Withered Forest Trees also known as Deku Tree Saplings, are objects from The Legend of Zelda: The Wind Waker. Following the Korok Ceremony, the Koroks fly off to distant islands throughout the Great Sea and plant trees to help spread the Great Deku Tree's forest. These eight trees become withered, however, and must be nurtured back to health with the use of Forest Water. Once Link has saved all of the Withered Forest Trees, the last one watered will start to sprout into a full sized tree, and drop a Piece of Heart for Link to collect. If Link fails to water all eight trees within thirty minutes, the Forest Water will become regular water, and all the trees that had been watered previously will wither again, forcing him to start over.
The eight Withered Forest Trees can be found in the following eight locations: the Cliff Plateau Isles, Shark Island, Private Oasis, Eastern Fairy Island, Star Island, Greatfish Isle, Needle Rock Isle, and the Mother & Child Isles.
Healthy Forest Trees (called Deku Tree Saplings) appear as part of Lana's Spear moveset. Using her Spear's strong attack, she can plant a Deku Tree Sapling that will quickly sprout into a Forest Tree, damaging nearby enemies.