Hrmmm. Depends on the inches between SL & APL for you, and how fast your hair grows. March 1st to May 31st is three months - so if it's about 1.5 - 2 inches between SL & APL, and your hair grows at the 'average' of 0.5 inches a month - it might be a stretch, but with protective styling alone, you should be close. If it's 3 inches or more - you'll have to pull all the growth aids out, and stick to the protective styling/low mani religiously - and it'll be a much bigger stretch/challenge.
Good luck, either way!