(B. Rapa Chinensis) 44 days. Great salad green - fast-growing plants make enormous loose heads of light green, ruffled leaves. Very mild - almost lettuce-like in flavor - with good frost tolerance. Now being grown and eaten on the International Space Station! 
Packet: 2g unless otherwise stated (approximately 1000 seeds) 
Good to start from seed in these months: 
North Florida: January- February, August-December 
Central Florida: January, September-December 
South Florida: January, September-December