When half of the buds in a vine reaches this point, it is the stage of debourrement - the dictionary calls it "unfolding" and for the sake of understanding adds "of the buds".

Please remove spaces between words.
Whenhalfofthebudsinavinereachesthispoint,itisthestageofdebourrement-thedictionarycallsit"unfolding"andforthesakeofunderstandingadds"ofthebuds".