Sign up for free workshops occurring throughout April and learn how to build a mini raised garden bed, or how to make a salsa garden, or some proper potting techniques. Plus, kids can register to create a garden cart planter. You'll get free soil and fertilizer with the first three workshops if you do the project in-store (although this may be contingent on your purchase of other necessary materials), but you can also choose to take the supplies home to do it there instead. Better yet, MyLowe's Rewards members get a coupon for $10 off their next purchase of $75 or more with any sign-up. (It's free to join.) Shop Now at Lowe's