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adv. grow topic... root growth in 12/12

Crazy Composer

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In my experience, the root systems of indicas react differently than the root systems of sativas after initiating the 12/12 flower period.

It has been my opinion, for years, that indicas produce very little root mass after setting into flower, while sativa root systems continue to grow in flower.

For example, years ago I would transplant the same day I placed plants into flower. The indica dominant plants would hardly colonize the available soil, while the sativas would colonize just fine.

Recently, I have shared this with friends who have considered this info to be some of the most important new info they've learned about growing pot in a long time. One person even called this insight the missing link to his growing ability.

Think about it for a minute... If you transplant an indica as it goes to flower, and the soil you provide is NOT fully used up by the root system, you will run into unforeseen troubles. When you feed the plant, the uncolonized soil around the main root ball will also receive food. Without roots (in the outer, unused soil) to use the nutrients up, you may be overloading the outer soil with nutrients, causing toxicity. This toxicity happens after just a few times of feeding uncolonized soil. This toxicity affects the entire mass of medium eventually, causing pH spikes and unpredictable nutrient levels.

The second trouble is during the final flush. If the soil in the pot is now partially toxic due to the above scenario, you now have to flush overferted, toxic soil. Not as easy as flushing well-colonized soil.

I learned a long time ago to do my final transplant on indicas or indica dominant hybrids about two weeks prior to flowering. This allows the roots to fully colonize the medium.

In nature, an indica has two seasons to consider... the growing season, and the flowering season. Both seasons are relatively short. Indicas do all their pre-flower preparations in the spring and summer, growing their leaves, stems and roots at this time. When they begin to flower, all their energy goes into producing flowers. Sativas are similar, but slightly different in an important way.

Sativas flower differently... They evolved in places where the available daylight is always close to 12/12, so they veg AND flower at the same time. This is why you can put a 4 inch sativa into the flower room and end up with a 6 foot beast 3 months later... they keep growing.

So, it stands to reason... sativas can be transplanted right as they go to flower, and even AFTER going to flower. The sativa root system doesn't stop growing after flowering is induced, as in indicas. Therefore we run into much less of the trouble we see in late-transplanted indicas.

I admit, this topic is not an easy one for many growers to get a grasp on... but for those of you who can grasp it, I hope it sheds some light on the topic. :)

Peace, good will,
cc
 

GudBud

Active member
Interesting thread....
I too usualy transtplant my indicas 2 weeks-ish before going 12/12 for this reason.
And an important point i think when i water them in for the first time after re-potting into final size pots to let the pot dry out right to the bottom before rewatering/feeding that way the roots will go looking for water and expand to fill the unrooted areas.

I don't grow sativas, but what about a 50/50 strain? i suppose it's another trait/pheno to look out for, if their root system edges towards the sativa or the indica style of growing out.

Gudbud.
 
i have not seen what cc is talking about yet because i havnt flowerd enough plants but i have read about it a few times and eveything i read goin right along with what cc said thank you cc for this is great stuff
 

Crazy Composer

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I don't grow sativas, but what about a 50/50 strain? i suppose it's another trait/pheno to look out for, if their root system edges towards the sativa or the indica style of growing out.

Good points. I would say that if you're looking at a 50/50 -or thereabouts- strain, you'd want to aire on the side of caution. However, experimenting to make sure wouldn't hurt either.

This is how I (believe) you can tell if your plant has enough sativa in it to allow for late, or in-flower transplants: Sativas will throw long cola arms as they flower. Indicas sort of bunch up and put flowers on growth established during the veg cycle. These elongating arms on the sativas will tell you what the roots are doing. If the top is still stretching, so is the bottom (roots). Sativas get these long buds because they are growing new bud sites as they flower, leading to these long arm-like buds.

Indica hybrids that stretch a lot during the first two weeks of flower (like Sour Diesel) could PROBABLY be transplanted the same day they are placed into flower, as long as the next two weeks see PERFECT growing conditions for profuse root growth.

The plants I would certainly NOT do late transplants on are the slow growing indicas that hardly stretch at all... like Bubba, Sour Bubble, Deep Chunk, Purple Urkle, etc.
 

Dr Dog

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I completely agree with your findings

I am getting burned by some late flowering transplants right now. The plants are not growing at all into their new homes
 

TGT

Tom 'Green' Thumb
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It is rare I find a thread that makes me think "gee, why didn't I think of that on my own?" Now that I read this I realize that is what I have seen in the past with gowing more indica strains than sativa. It seems the indica's never filled the pots, and now I know why. I always transplanted and then triggered. Thanks for that valuable piece of info. This will most definetely help me out on future grows. It's funny I just started a thread asking this exact question, and here is the answer. Very observent indeed! Thanks again.

TGT
 
P

Pandemic

TGT said:
It is rare I find a thread that makes me think "gee, why didn't I think of that on my own?" ........ Very observent indeed! Thanks again.

TGT

:yeahthats

Thank-you for taking the time to post your observations and laying it out so well. This is what I am taking away with me today fromm ICMag. Valuable info here!
 

KindHypnos

Member
Excellent posting CC, and a very good observation...

Seems that this could easily be used to help manage sativas indoors... if you managed to transplant within a week or two before stretch ended, but not before.... theoretically it would constrain the beast while still letting her spread her legs out...
No?

Anyone tried this??
 

Crazy Composer

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KindHypnos said:
Excellent posting CC, and a very good observation...

Seems that this could easily be used to help manage sativas indoors... if you managed to transplant within a week or two before stretch ended, but not before.... theoretically it would constrain the beast while still letting her spread her legs out...
No?

Anyone tried this??

Sativas will stretch no matter how much soil they get. When they have root space to fill, they will put more internodes (more budsites) on the branches as they stretch. The trick with real deal sativas is to flower them short and give them all the root space they need until stretch stops.
 

Grunt

Member
CC, this is why I think this site is priceless! Even after 35 yrs, I'm still learning valuable lessons about that which I am so intrigued. Excellant observation and a great job at retaining and posting for all to referance. Another piece of the puzzle falls into place.
Thanx, Grunt
 
M

moses224

In my opinion they should be transplanted but if your going to do it late do it no later then 1 week after switching light to 12/12. IF YOU WANT THEM TO STRETCH (WHICH I DID) I currently have 6 that i did this way (was forced to unfortunately) and they filled the 3g bag. But i wasnt definately pushing it
 

magiccannabus

Next Stop: Outer Space!
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Organic growing avoids all of these problems. No flushes needed, no pH concerns, harder to burn, makes nutrients more available without salts. I'm going all organic this time around and it's the best decision I have ever made about growing except maybe adding coco coir to my soil mix.
 

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