Rivoli Radishes take around 30 days to reach maturity. This variety develops red, round roots when mature. Approximately 30,000 to 50,000 seeds per pound.Rivoli Radishes matures uniformly with attractive greens. This variety produces upright leaves with even-colored fruit.Germinate at 60 to 65 degrees Fahrenheit for 4 to 6 days. Plant seeds at a depth of 1/2-inch.