The pot has good drainage.
What size is it Rebecca - and what size is the pot? They can take a while to settle and start flowering, and need plenty of food and rich soil to thrive. If it's potted long term, it will need a soil based compost and not just multi purpose as that won't have enough nutrition for it over a long period.
They often aren't happy in pots long term either. It depends on variety as to whether they're suitable as pot specimens - they're nearly always better off in the ground.