Plenty of Plants Trophy in Harvest Moon: A Wonderful Life Special Edition
Plenty of Plants
Plant 20 crops.
How to unlock Plenty of Plants
You can buy seeds at Vesta's Farm but, for the sake of this trophy, make sure they're not tree seeds. You'll need to have 20 crops planted at once, and trees don't count towards the total. So, while trees are a good source of income, they won't help you here.
Personally I would recommend that you plant turnips once it's summer as you can easily use them towards Main Course.