For this achievement, you have to make all the flowers bloom in the game.
If you notice, every now and then, you will run past some purple bulbs on the floor, and as you pass they will grow into flowers- you have to find and do this to all the flowers in the game.
Key here is the tracker. Every time you enter a zone/level, it will show the name - such as "Foliage" and then have a flower symbol next to it (out of 4). This is your guide to how many in that area you have/still need.
There are 44 flowers in total, and from the central area, the flowers are as follows;
Winter (top right zone) - Creek, Island and Ancestors
Summer (top left zone) - Ranges, Foliage and Summit
Spring (bottom right zone) - Pit and Cascades
Fall (bottom left zone) - Puddle, Quagmire and Underground
https://www.bing.com/videos/search?q=seasons+after+fall+flow...https://www.bing.com/videos/search?q=seasons+after+fall+flow...https://www.bing.com/videos/search?q=seasons+after+fall+flow...https://www.bing.com/videos/search?q=seasons+after+fall+spri...Full credit and Kudos to Off Limits for his very helpful video guides.
Also note that after you complete the game, you are free to explore, so can get this achievement then.
Good luck!!