According to Target's corporate offices, Target will be closing the Garden Centers.  It's not profitable, so they're shutting them down.

So... this usually means a sale!  We'll see.  The closing date for the centers is late September 2010 - so keep your eyes open for sales signs! 

Here's the official statement from Target:

After careful review and consideration, Target has decided to close our Garden Centers. This is no longer a profitable business for us and does not provide significant value to our guests. We currently operate 262 Garden Centers in primarily four states (Florida, California, Arizona and Nevada), including 90 Garden Centers in Florida. By contrast, we have nearly 1,800 Target store locations in 49 states.

The effective close date for our Garden Centers will be late September 2010. In the meantime, we will operate our business as usual throughout the summer season. Although Target will be closing our Garden Centers, we will continue to carry lawn and patio assortments within our seasonal section of the stores from January through mid-September. Assortments and set dates may vary by store and geographic location. With the closure of our Garden Centers, the only significant category that will no longer be represented is live plants.