Initially food regrowth needs mass overhaul (4,3,4,2)
I believe the answer is:
from the word go
I'm afraid I can't explain this answer.
Can you help me to learn more?
(Other definitions for from the word go that I've seen before include "At the offset" , "Immediately at the beginning" , "with no preliminaries" , "How Monopoly starts" , "As soon as things start" .)