There's a Grower's Outlet on 521(South Boulevard) in Pineville between 485 and Highway 51. I wouldn't say the prices are deeply discounted though. I don't go there because they are to real nurseries like WalMart is to small business. G/O put at least two of my favorite small/personal/unique nurseries out of business so they don't get any of my $$.

I have been to G/O on occasion - not my favorite place though. I love Rountree Plantation Nursery off of Old Pineville Road, though it is not a discount nursery. I could wander around there for hours. My other favorite place, with often great prices, is the Farmers Market on Yorkmont Road, parallel to Billy Graham Freeway. On Saturdays they have a plant shed pretty much full of vendors - herbs, shrubs, trees, hanging baskets, pots, etc. Grab a bag of roasted or boiled peanuts as you browse. Things are winding down for the spring season though.