The timeline of Thrive spans 2 years (and 5 months), traveling back in time for anyone who has read the Calloway Sisters spin-off series. In addition to years & months you've never seen, Thrive covers the same time as Kiss the Sky and Hothouse Flower.
PLUS IT INCLUDES THE MONTH AFTER HOTHOUSE FLOWER ENDS. So by the end of Thrive, the Addicted series timeline will be ahead of HF.
If you understand better with pictures, here's a visual of the Addicted Series Timeline: