1.Request a pack of free Patriot Garden radish seeds (which will contain 15 20 seeds).
2.Plant three seeds every 1/2″ at a depth of 1/2″. Water them every day and watch them grow. When the plants are 2 inches tall, thin them to 1 inch apart so they will not compete for natural resources.
Scroll down a bit-
http://patriot-gardens.com/request-seeds/