The Plantdex is your collection book. It has 60 entries: each of the 12 plants in its normal, Wet, Golden, Frozen and Giant look. Open it from the Plantdex button at the bottom of the screen.
Rewards
The first time you grow each entry you get gems:
- Complete a plant’s row (all five looks) and that plant sells for 10% more, for good.
- Complete a page (every plant in the Backyard or the Greenhouse) and every plant there sells for another 10% more.
Finding the missing ones
Tap any empty entry and the Plantdex tells you how to find it, with the chance per plant. The mutations page has the full odds.