Thanks everyone!
No they aren't closing, they were mostly just cleaning up and the Vendors were there clearing off shelfs for new plants. It was funny, I asked for 10 flats of snapdragons to begin with and they went and cleared the shelf they were in so they could bring me a few more. Manager had loads of info too, he was filling me in and I was trying to remember everything. lol He told me that the plants that are on the clearance racks are the ones that don't have flowers on them at the moment and can't sell them full price like that, and if they bloom again they go back on the shelf.
Each time that I've gotten a nice deal from them it's been on a Friday. So I'm thinking they want it cleaned up and cleared out for the Weekend business.
Hope you all find good deals too!!!