While they are easily bought in most grocery stores, growing your own will offer you a less expensive, healthier, and more satisfying sprout experience.
There are quite a few methods for growing your own sprouts, but I have found the bag method the best by far. You can spend $15 or more on a sprouting bag, or you can make your own for a few dollars - or less if you already have some fabric on hand that you can use.
What you'll need to make the sprouting bag:
* 1/4 yard or so of natural fiber fabric (cotton or hemp are recommended)
* 1/2 yard or so of ribbon, twill tape, or twine for a drawstring
* sewing thread (to match your fabric if you like)
* sewing pins
* sewing machine
* buttonhole attachment for your sewing machine
* tailor's chalk or something else to mark fabric
* seam ripper
* tapestry needle or safety pin
* cigarette lighter or match (optional)
What you'll need to use the sprouting bag:
* seeds intended for sprouting (varieties are practically endless, see step 5 for ideas)
* clean water
* bowl large enough to rinse your finished sprouts
* container to store sprouts in
Step 1: Cut Fabric, Pin & Sew Hem
Add 1-1/4 inches to the desired height of your bag and 1/2 inch to the desired width of your bag, then multiply the width by 2. (8 inches tall + 1-1/4 inches = 9-1/4 inches; 6-1/2 inches wide + 1/2 inch x 2 = 14 inches.) This will be the size to cut your fabric. I like to make one of the long edges the selvage of the fabric. (The selvage is the edge of a woven fabric that is finished to avoid fraying.) Cut the fabric rectangle.
If you are not using the selvage edge, use the zigzag stitch on your sewing machine to "seal" the long edge of the fabric that will be the top opening of your bag. Now, with the wrong side of the fabric facing you, turn down 1-1/4 inches of the long edge (the selvage if you're using it or the zigzag finished edge if not) and pin in place. Using a straight stitch, and remembering to reverse a few stitches at each end of the seam, sew very close to your finished edge, removing pins as you come to them.