Plant radish seeds 3 weeks before last frost date. Radishes are a cool weather crop and can withstand mild freezes. Fill the 13 inch round container with soil to one inch below the rim. Make two rows 4 inches apart. Make the rows ½ inch deep. Place the seeds about 1 inch apart in each row. Cover with soil. Thin to 1 plant every 3 inches once the seedlings are 1 to 2 inches tall. Thinning will avoid slow developing plants which are often more woody and hotter.
Once the plants get to about 4 inches tall they are ready to harvest. Then plant a row of seeds in the middle of the two rows you just harvested and repeat the process. You will be succession planting radishes in the container so you can harvest throughout the season.
Radish is one of the fastest growing vegetables. They can be harvested between 20 to 60 days depending upon the variety. Check them regularly to see if they are ready to harvest. Spring radishes can be harvested when they are ¾ inch to 1 ¼ inch in diameter. If you leave them in the ground longer the roots will become more woody and hotter.
The roots add a touch of hot to salads and you can also use the leaves for salads too.
Mature in 20 to 40 days