The Farmer Freeman EZ-XY Plant DNA Sex Test Kit (5-Pack) is a mail-in laboratory testing kit that allows cultivators to determine the sex of up to 5 plants as early as 7 to 10 days from sprout. By identifying female (XX) and male (XY) plants using qPCR DNA technology, growers can cull unwanted male plants early, saving time, space, labor, and nutrient costs.