Budding question

First time grower with a quetion. How long for the buds to start. When should I start to look for the sex of the plant. Plants are being grown outside. Thanks

southern or northern hemisphere. they start budding in august in the northern half of this world, i dont now about the south. if they are from seed 4-6 weeks and it will show its sex

i think buds have begun in the southern hem.