The 12-12 From Seed Thread

[Frank Nitty]

 

[Frank Nitty]

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My 12-12 plants hardly ever stay short even when I top them

 

[MintyDreadlocks]

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Strain has to be a sativa because even with 12/12 they will still veg for a certain amount of time based on genetics. How many days start to finish?

 

[MintyDreadlocks]

My cognac was 60 days strat to finish 12/12

 

[Star Dog]

To try and stem stretching the plants I flipped early were left in 1ltr pots until sexed and/or past the worst of the stretch, i then re potted them to 5ltr pots and done some selective defoliating afterwards.

Today they're all 19-21" with the exception of one at 26" but was untouched.
jfc I'm measuring the plant height from the rim of the pot.

It's sister was vegged for a couple of weeks more than the above and with some defoliating it's 20"

 

[Frank Nitty]

Strain has to be a sativa because even with 12/12 they will still veg for a certain amount of time based on genetics. How many days start to finish?

80-90 days, give or take...

 

[Frank Nitty]

One of them was vegged for almost 2 1/2 months and then put to 12/12

 

[Frank Nitty]

One of them was vegged for almost 2 1/2 months and then put to 12/12

This plant... Growing in a 2x2x5 under a Mars Hydro FC E3000

 

[hillbill]

I’ve gone as far as 101 days for Sativa types. Some strains really do well 12/12 from seed and a few not so much. Not seeing a pattern yet on that. One thing I really like is there is no change of light schedule throughout the entire life of the plants. One less stress maybe.

 

[Star Dog]

This is where I was at the day i flipped.
(minus the green tray)

That was about 30 about days ago here's a pic from today.
The early ones don't look any different to plants grown in the regular way, they're nice and compact circa 20/23"

I'm looking forward to seeing how these go.

 

[Humanrob]

This plant... Growing in a 2x2x5 under a Mars Hydro FC E3000 View attachment 5212246View attachment 5212247

Since you grow both photos 12/12 from seed, and autos, how would you say the run time and final weights compare? I realize there are variations between strains (with both types), just wondering overall what your impressions are, and when you choose the next grow, what motivates you to grow one or the other?

 

[Frank Nitty]

Since you grow both photos 12/12 from seed, and autos, how would you say the run time and final weights compare? I realize there are variations between strains (with both types), just wondering overall what your impressions are, and when you choose the next grow, what motivates you to grow one or the other?

I'm gonna run one of each,12/12 and 18/6, because I've never paid much attention to the difference of the grow times...

 

[Star Dog]

This was the day I flipped them, 13th October, 1 week.

Today...


Any females are going back to veg I'm too late in my grow now to continue with them, if you remember these were flipped at varying times from seed.

I've cut the tops off two both were 27-28" the others are 20/24"

 

[Star Dog]

It'll be two weeks tomorrow since I flipped them ^^^^ when should I really start paying attention for the sex?

They're in with my main crop so I really can't afford to get caught out, i checked them today but no signs either way.

It's only 20/22c under the canopy with less than ideal light but they're growing great, I'm a little surprised they've not stretched more with being in the shade.

 

[VincenzioVonHook]

I'm going 12/12 from seed this run. Have a chemdog#4, and two Nepalese landrace. The chemdog is back right. The two at the back are 14 days today, and the one at the front is 11 days.

I haven't noticed any difference in how they are growing so far, not stretching as much as I expected. The chemdog is popping out 6th node in two weeks. They are getting 710umol/s ATM.

Hoping I can keep size down a bit as I expect to fit two plants in a 3.3x1.6 tent, and another in a 1.6x1.6x4 which should be a challenge. I've never had luck getting photos to flower quickly. Last time I ran 12/12 it took seven weeks to pre flower and I had to give the plants away..

 

[hillbill]

I usually begin to find males at about 20 days on most I have run 12/12seed. I do have excellent glass.

 

[Opie1971]

I usually begin to find males at about 20 days on most I have run 12/12seed. I do have excellent glass.

20 days from sprout? That’s quick, I’ve had some that showed at 4 weeks, but most are 5-7, around the time you start seeing alternating nodes.

 

[Star Dog]

According to my notes i flipped this on September 12th and re potted it on 29th the day it confirmed its sex.

12th...

29th.

I checked the most recent ones this morning (16 days) no signs yet but going on growth pattern I'm guessing two are female and two male?

 

[VincenzioVonHook]

Day 19 from pop. Getting far more vigorous growth than expected running 12/12 from birth. Pushing out 8 nodes in under three weeks is a good effort. The landrace has really vigorous branching and the nodes are already alternating in the lowest node.


Landrace left and middle, chemdog #4 right. Moved into the bigger tent and threw in the long board.

Could also be improvements from running far less amendments with macros and focusing more on mineralisation for the seedlings. I usually throw them straight in a pretty heavily amended mix, but this time they went in 3L pots of yard soil/Coco fibre with rock dust (palagonite, gypsum, volcanic and glacial mix) mycos and uxp pumice as aggregate. Plan on up potting into the same mix with some Dr greenthumbs go and grow (4-2-3) organic blend (soybean, alfalfa, Neem, kelp, coconut and rock dust) when stretch kicks in, and top dress some bud and bloom (0.5-2-3, same ingredients different ratio) whdn flower is in full swing.

 

[Star Dog]

I commented on suspecting two are female and two male.
They're 18 days today.

They're different from each other, that could be for many reasons but time will tell.