The time it takes to show sex is mostly strain specific. However, I leave mine is the big plastic beer cups until they show, usually between 4-6 weeks. It is my opinion that the slight stress from becoming rootbound in the cup causes the plant to shoot out preflowers earlier than normal.
I then just repot the confirmed females and carry on normal veg until time to flower.
Perp Reviewed by Perp on . Seed to sexing time How long approximately from germination will it take to determine the sex? Would it be ok leave in a pot until sex determined then replant in the ground for a outdoor grow? I will be interested in these strains Early misty and northern lights? Rating: 5