In Texas we have two growing seasons.  If you’re planting soon (March 15th in my zone), you might want to join the Garden Club at Calloway’s/Cornelius Nursery.  They’ll email you a coupon for $10 off $20 purchase.  I’m not positive, but it looks like you’d be able to use it repeatedly, but you might want to ask first.  I just got my coupon today, though I joined a month ago.

They have other money saving programs as well.  Just walk in and ask them to explain them to you.