As it is pot grown, you can easily leave the plant in its pot for a few days/weeks before planting it into a bigger pot or the ground. Just ensure you give it plenty of water and it gets enough soon. Please ensure you don't leave it for too long, however, as you don't want the roots becoming root bound.
This is a dwarf variety of Red Robin with a slow growing habit, meaning it is rather low maintenance. You should only need to give it a quick trim during Spring (setting it up for the Summer), as well as a tidy up in Autumn if needed.
Please note, we do recommend protecting the plants from frost as they're rather prone to damage (especially young plants).