I suppose any passiflora could become invasive given the perfect growing conditions. I havent heard of ruby glow being particularly invasive though. I always hear of maypop, and a few others being called invasive. I would consider ruby glow a plus if it invaded my garden lol! I have mine and all my others in pots and just leave them out year around in my climate-you prob could in yours as well. Just place your pot against a trellis so they can climb.
~SJN

I've had one in the same spot for.. 2 or 3 years- No shoots poppin' up somewhere else or anything. So.. I'd say don't worry about it.