FarmVille Wild Service Tree from Mystery Seedlings, The Wild Service Tree is available by growing up the Mystery Seedlings.
Wild Service Tree Mastery Requirements & Rewards :
Mastery Level 1: 75 harvests / Rewards: 25 XP and 500 Farm Coins
Mastery Level 2: 150 harvests / Rewards: 75 XP and 1,500 Farm Coins
Mastery Level 3: 225 harvests / Rewards: 250 XP and 5,000 Farm Coins