Going straight from solo to a 5-gallon pot means a waste of time. Plants grow roots almost exclusively when they go into a new pot. They need to be able to support the plant. Once the roots reach the inside of the pot they will start growing vegetation above ground. By going first into a 1-gallon pot you are cutting way down on the time you will spend waiting for roots to bottom out. In effect the smaller pot is telling the plant to veg earlier than a larger pot. If you want a humungous plant leave her alone. I would re-TP into a small pot to save time.
Good luck, BigSteve.