Time of sexing plant ????

[madeline]

It can take up to 3 weeks to see flowers if the plants were forced too early. If alternating branching is already begun then you should see flowers growing after 10 days or so...

[dutch.lover]

you probably should have just waited til they preflowered in veg stage before moving them into flower. putting them into flower doesn't actually make them flower anytime sooner i have heard (jorge cervantes), because the plants need to mature first. preflowering in veg stage is the sign your plants are mature.

[chesteratkins]

I am facing the same question....when to start 12/12?

My personal grow is just about at week 7, from seed, and the plants are around 18"-24". I can't see any pre-flowers, although I'm not 100% sure what I'm looking for, and did wonder if I should switch to 12/12 prior to determining sex, or after determining sex?

Reading some other posts, it seems people are switching to 12/12 at around week 7 but, albeit with my limited knowledge and experience, this seems too early to me. Is it?

I was thinking I would need to wait until 9-10 weeks had passed, from seed, to determine sex and, if required, remove the males and THEN switch to 12/12.

Any advice would be greatly appreciated. I'm growing NL, if that helps! :jointsmile:

Thanks again

Peace
Chester Atkins
Nashville

[dutch.lover]

wait until your plants preflower (info on preflowers is not hard to fine) before putting them under 12/12 lighting. If you want them to preflower earlier, you can try switching to 18/6 if you are currently using 24.

[chesteratkins]

Hi dutch.lover.
Couple of different responses I'm getting really...some saying wait until pre-flowering before moving to 12/12, some saying move to 12/12 and then determine sex.

Hard to find a definitive answer really, so I guess I'll try waiting until I can take some pictures of the pre-flowers, if I need to, to get some help identifying them. Sure, I've looked at books and on the web, but being my first grow I don't want to make a mistake if I can help it.

At the moment, I'm doing 20/4 for lighting. If I moved this to 18/6 now, you think it would speed up the pre-flowering in the veg stage? Would this in any way trigger flowering considering I've been on 20/4 for 7 weeks?

Thanks again for the advice and help. Really appreciate that.

Chester Atkins
Nashville

[LIP]

A cannabis wont flower untill it is mature enough, eg, time from sprouting.

Alternating internodes are a sign of maturity.

And vegging a plant untill preflowering is all well and good, but it's not needed.





The plant measures the uninteruppted darkness cycle, which then reasleses a flowerinh hormone.

Just be patient and the plant will flower.

[Weedhound]

I agree with Lip..I don't wait for pre-flowers...time wasted in my book....my plants have always shown sex between the 10-14th day of switching to 12/12 regardless of when I turn them.