Transplanted Red Salvia Is Not Growing

Question From: V. Gaston - SOUTH CAROLINA
Q: my red salvia seems stunted. I got it as a small 2" pot at home depot and it has since shrunk back in size and hardly grows at all. It gets plenty of warm sun.
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It's in way too large of a pot and it's drowning. 
A single plant should only be be transplanted into a pot no more than 2 inches larger.
Best Nancy