Radishes are one of the quickest crops I grow, taking as little as 3 weeks to mature. They like the mild weather of spring and fall, but can be grown almost year round with cold frames. I want a couple of dozen radishes a week, so I plant 32 new radishes every weekend to keep a constant supply at hand. I always plant a few more than I want because I'd rather give away extras or feed them to the chickens than come up short.
Start with a level, weed free soil surface in a sunny location. I plant 16 plants per square foot using a wooden template that I made.
This antler from a small deer I shot is perfect for making 1/4" deep divots in each opening. Into these divots I drop 2 seeds per opening. Seeds are inexpensive and this insures that I will have a radish in each spot.
Once the seeds are in place, I sprinkle a little loose soil over the template and then wipe it clean. This covers each seed to a uniform depth. Lightly water in place being careful not to disturb the seeds.