User blog comment:Fairy27/Suggestion about the order of unlocking worlds/@comment-26520884-20151226161419

1 - AE (obviously)

2 - PS (Snapdragon, Cherry Bomb and a very easy world with Blover)

3 - FF (Good plants and a easy world)

4 - DA (Part 1 is easy)

5 - FC (some plants are good)

6 - WW (it is a challenging world, plus the melon bros aren't that useful in normal levels, only in Endless Zones)

7 - LC (Fast paced levels so you need a lot of cheap and effective plants)

8 - NMT (An hard world so it's better to be one of the last, plus the plants aren't really good)

9 - JM (Super useful plants but an hard world)

10 - BWB (Everyone knows why)