If the stick you planted sprouted a few leaves, than I am going to say it was a healthy bare root tree. The problem may be that once it started to grow the soil dried out or the weather became too hot and the roots stopped supplying water to the expanding leaves. Don't give up just yet. Keep the soil moist and add a mulch to keep the soil cool. Sometimes a young tree will drop all leaves and look dead only to revive the following spring with lots of new growth. Keep growing, Marianne Binetti