Planting density and sowing date affect the yield of Guangliangyou 272 hybrid rice. Higher density and mid-April sowing result in the highest yield. More plants lead to more tillers but fewer grains per spike. Delayed sowing date decreases yield, while early sowing slightly increases it. The best yield is achieved with a planting density of 25.8×104hill/hm2 and sowing in mid-April in Hubei Province.