Just when you thought you had unlocked everything Hay Day has to offer when it comes to farming, you find out that there is in fact a whole other tier of items to buy, in the Trees and Bushes category! These are more than just pretty decorations, in fact they provide you with new items of produce.
Trees and Bushes are somewhat unique, in that once you have purchased and planted them, you only have a limited number of uses before they wither and die. At this point, you can enlist a friend to revive it, gaining you XP and another batch of produce. After this, however, it will literally be an obstacle in the ground requiring you to cut it down to get back the space it occupied.
You can see the full list of these below:
Unlocks at Level 15
Unlocks at Level 19
Unlocks at Level 22
Unlocks at Level 26
Unlocks at Level 36
Unlocks at Level 42