I've heard of people adding primo to their HRT all year long. But they are on HRT.
Just remember the longer you're on (I would imagine your on some test during this), the harder it is to come back, if you do. A nice buddy of mine was a test-only cycle finatic. He would do 8-12 week cycles a couple times a year. One time he decided to be on test all fall/winter/spring, like half the year almost, and he was on PCT for almost 4 months trying everything to get himself back. He lost almost 20lbs of what he had gained and it was miserable to watch him. It was one of the reasons I stopped using gear for so many years.
Don't be greedy.