Need help wih pot size and yield.

[FullKeel]

Here is a grow scenerio a friend asked me about and I bring it to this forum for opinions and advice. He is in an area where he is allowed 12 plants, no more.
Cuttings are currently under dome waiting for roots...any day now.
Growi in promix
Ffarm nutes
Veg room- 7'x13'x8'
lighting 4-4'x2' 8bulb T5
Flower Rm 13x15'x8'
Lighting-6-1000w hps
I know wih his lights it would be possible for him to get a half lb. Per plant
Does anyone have any advice on how to best go about this? i know it would have to probably be an 8 week veg, but not sure about pot sizes, when to repot, when to put them into the final finishing pot and how large that pot should be. He mentioned putting them in a 15 gal right before sending them to flower, but this does not sound correct to me as most of the root growh would be over with bythe time plants go into flower rm. (I could be wrong)
Any guidance would be greatly appreciated. Thank you.

 

[RonSmooth]

I have no experience with pro mix but with coco coir, it is possible to use relatively small pots and still get good yields. With one 600, I get between 2.5-4oz per plant with 6 weeks veg give or take a week.

I transplant a few days before flowering. I have done it the day of and well into flowering though and didn't see any issues.

15 gal per plant is a lot of media. If he would consider coco, he could grow the same plants in 3-5 gal.


The other consideration would be maximizing the light penetration into the canopy

 

[aridbud]

If using Promix, go with 5-7 gallon containers/sacks/pots....and if root bound before inducing flowering, transplant to 10 gallon.

As long as plants are fed a steady mix of veg nutrients, watering only or flushing before bloom, he'll be astonished at what can be done (1 plant per container).

 

[FullKeel]

So I should question he initial advice I recv'd on a similiar post advising me I would have to go with 15 gal to get root mass large enough. Thanks for the input! And you mention light intensity, lights were approx. 12" from canopy, no signs of heat issues or bleaching, but then he moved lights to appox. 18" above canopy, his reason was that he wanted the plants to stretch, bc hat's how the grow .(??? Statement imho lacks logic, but I could be wrong)
Plants are in 12/12 btw.
Please let me know what you think if you please.
Thanks again really appreciate the replies.

 

[FullKeel]

Btw..with 6000w of hps, I feel 1lb per watt should be the min. 12 plants @ 4 oz. each will just not cut it.

 

[FullKeel]

Btw..with 6000w of hps, I feel 1lb per watt should be the min. 12 plants @ 4 oz. each will just not cut it.

Sorry Ron. Regarding the 4oz comment, I did not notice you were running a 600; And with a 6 week veg... That would make me smile.

 

[Euphoriaholic]

You have a 8 foot vertical space. Minus 1 for pot height, minus 1 for reflector height and 1.5 foot for the space between the plants and the bulb. That leaves you with about 4 feet to 4.5 foot plant.

You are trying to get a 8oz from a 4 foot plant. Are you planning to top the plants?
Regardless, it is going to be a wide plant. At least 3 x3 sq ft per plant.

A 1000w light is good for 4 x 5 sq ft area (50 watts per sqft). I can see about 2.5 plants per light, maybe three. So with 6 lamps you can use 15 to 18 plants in the room. It will get you 7.5 to 9 pounds of harvest.

Btw 15 gallon pot and 8 weeks of veg is an overkill. You can easily get a 8oz plant from a 10 gallon pot with shorter veg period. Maybe you are running a low vigor low yielding strain?

As far as transplanting goes, 1 gallon to 3-5 gallons to ten gallons.

 

[FullKeel]

You have a 8 foot vertical space. Minus 1 for pot height, minus 1 for reflector height and 1.5 foot for the space between the plants and the bulb. That leaves you with about 4 feet to 4.5 foot plant.

You are trying to get a 8oz from a 4 foot plant. Are you planning to top the plants?
Regardless, it is going to be a wide plant. At least 3 x3 sq ft per plant.

A 1000w light is good for 4 x 5 sq ft area (50 watts per sqft). I can see about 2.5 plants per light, maybe three. So with 6 lamps you can use 15 to 18 plants in the room. It will get you 7.5 to 9 pounds of harvest.

Btw 15 gallon pot and 8 weeks of veg is an overkill. You can easily get a 8oz plant from a 10 gallon pot with shorter veg period. Maybe you are running a low vigor low yielding strain?



As far as transplanting goes, 1 gallon to 3-5 gallons to ten gallons.

It's all new, I have no idea the potential yield of these strains. Blueberry, white widow, bubblicious, east coast sour d, dr. Greenthumbs freedom 35.
Thank you for your help!

 

[aridbud]

Rather than top them (having low ceiling), low stress train them....gently bend down....let stalk/branches get used to the stress. Then proceed slowly bending more.

Otherwise...SNAP! There goes your stalk, side branching. I use cotton string in a slip knot and duct tape....there's lots of ways to LST.

Learn from mistakes made so you don't repeat them.

 

[FullKeel]

Rather than top them (having low ceiling), low stress train them....gently bend down....let stalk/branches get used to the stress. Then proceed slowly bending more.

Otherwise...SNAP! There goes your stalk, side branching. I use cotton string in a slip knot and duct tape....there's lots of ways to LST.

Learn from mistakes made so you don't repeat them.

Thanks yiu ! Yeah, LST, I'm becoming a big fan...That and fimming.
Matter of fa t I have some pics of some lst plants.
Thanks again amigo!

 

[JointOperation]

yield has to do with .. root size.. plant size.. genetics.. light intensity.. and dialed in nutes.. and health of the plants..

ok.. so with your situation.. id run 5000 in my flower.. and run 1 of those 1000s.. in my VEG room.. so that u get faster growth and more bushy plants.. id top them.. and lst if needed.. but id fill the entire canopy under the lights before flipping into flower.. it doesnt need to be full full.. but to the point where if the plants stretch a nice amount. which most do. ull have a nice canopy of buds..

it really depends on the situation.. are u providing for anyone else or just trying to stay medicated.. are u looking to be harvesting every 3-4 months or every 6 months or.. every 3-4 weeks.. i mean alot of growers.. grow by what they need.. and or want to harvest..

but im sure if ur buddy reads up on it.. he might be ok.. but still if u flip to early. just turn off some lights.. and grab reflectix or mylar to make the walls closer in.. my friend uses movable walls for that reason.. if a strain doesnt stretch at all.. he will put them under how ever many lights is ness.. and then turn the rest off.. so ur not wasting electricity.. if u need help with anything let us know.