Stonerdanswered grow question 4 years ago If you're looking for a magical way to speed up your grow then I'm sorry to tell ya we ain't there yet :/
For now to get the fastest growth rate with best results just give your plant a proper diet and condition, this will ensure constant uninterrupted growth.
On your next grow if cycle time (the time it takes to run a whole cannabis growth cycle) is a factor for you then choose your strain accordingly!! some strains with unique genetics have extremely fast growth rate (but they usually come with lower yield/potency expectations).
Seems like your plant is quite healthy (might wanna reduce Nitrogen dosage but hard to determine that from this single picture).
Hope this helps! Good luck and happy growing :)