i would really wait till mid may june cuz u dont want your plant flowering early and then reverting later in july and august i had that happen to me 2 years ago
yeah just wait till june if grown right they will b like 6-7 feet tall by harvest time....or u can transplant outdoor early and end up having huge plants like doublejj
holy grail is a potent high yielding plant if you know what your doing it has all the good og traits......but in taste, high and smell i would go with og 18 thats one fire ass plant for a true og connisseur