Hi just wondering, I'm just growing my first crop. I was wondering if you need to wait to see the pre flowers appear before you can put the plants in 12 sun 12 night. Or when can you put in the plants in 12/12 instead of 18/6. I've heard that if you put the plants in 12/12 before you see preflowers then you'll stress them out so much that thee will become hermathidites? Any help would be most aprreciated thanks.
Need to see preflowers before 12/12
- Thread starter friday13
- Start date
LadyKimi
Well-Known Member
I personally did not wait until preflowers and in the zillions of posts I have read I have not noticed it being a huge priority. You can find a lot of the info like this here https://www.rollitup.org/newbie-central/1326-101-already-asked-questions.html
Good Luck!
~Lady
Good Luck!
~Lady
Brick Top
New Member
You do not need to see preflowers before you switch your light cycle. Plants have the hormone in them to begin flowering at all times and all that is needed to trigger it is a change of hours of light and dark. You start plants at 12/12, you do not need to veg. If someone is growing a taller strain it is very common to start the plants out at 12/12 so they do not grow too large.
It will not stress plants and it will not cause hermis.
irishstaff
Active Member
You can induce sex @ anytime , like brick top said
Alright thanks, one last thing, I have a 4 foot grow room height, I know this is sort of a stupid question becasue it depends alot on stands, but how high should I let a plant veg. before I pu them in 12/12, because I've heard that the plants will grow double their size when preflower to flowering. Thx
PussymOneyWeed
Well-Known Member
definintly depends on strain and lights. What kinda light are you using? Is the 4 feet high including the room the light takes up?
blaze1camp
Well-Known Member
i myself do wait to see preflower just cause when they begin to show that means the plant is reaching maturity (4-6 weeks) and at that point you can flower...
irishstaff
Active Member
Dosnt matter about how high your room height is , You can lst your plants . There is aload of threads on LST
Brick Top
New Member
The answer to what height should someone veg their plants is based on several factors that will differ very much from one growers setup to another so there is no singular answer.
Start with the total height of your grow area. Then subtract the height of your pots or hydro/aero system etc. Next subtract the height of your lighting/hood when it is raised to the absolute highest it can go. (Measure from ceiling or joists or whatever the lighting is hanging from to the bottom of the light/reflective hood. Then subtract the minimum amount of distance that needs to be maintained between the tops of your plants and your lighting.
The number you come up with is your total usable height.
Unless you are using a training method to keep your plants low or growing dwarfs you can expect your plants to double in height in flower and tripling in height during flower is not something out of the ordinary so you do have to factor in that possibility. (Even more so if growing a sativa or something that is predominantly sativa. I have had sativa varieties jump up more than 6-times in height in flower) So you have to do the math yourself.
But wait, there’s more! There is no reason in the world for anyone to every veg a plant to a height that when in flower it then outgrows the growers lighting capability.
For example if someone using a 250-watt HID grow light vegged their plants to say 18 or 20 inches before throwing them into flower in most cases they would get good production from roughly the top third of their plant and decent to slightly less than decent production from the middle third and from the bottom third they would get either popcorn or nothing at all.
That being the case what was gained by vegging the plants long enough to end up with plants that are one third unproductive? The answer is NOTHING!
To get little to nothing in return you paid more in electricity bills burning your lights longer in veg than was needed, you added hours of usage on your bulbs degrading them causing them to need to be replaced sooner to then maintain the highest quality light rays you can get, you paid for and used more fertilizers and or other nutrients/supplements, you had to work with your plants more and that does add a certain risk factor as at times lights are dropped while moving them or branches/stems are damaged or totally broken while repositioning your plants or watering/feeding them, the longer a plant grows the greater chance there is it will suffer some problem from a deficiency to bug problems and you will add additional time to your overall from germinating your beans to harvesting time … all for little or no additional production. (If someone is an occasional grower and not someone who continually grows they could then also add the increased risk to be found out factor because as long as plants are growing there is the chance you will get caught growing them. When that overall time is shortened you lessen that risk slightly, along with lessening all the other things above.)
So figure out what your actual usable space is, what height your plants may reach if they double to triple in size while in flower and then look at your lighting and figure out what the maximum height is that it can supply adequate lighting to for an acceptable amount of production and then you will know how tall you should veg your plants.