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A Complete Guide to Topping, Training and Pruning

Kodiak

Mad Scientist
Veteran
No problem guys

dr-stevo, you can LST plants without topping them but then you have to make sure that the main shoot is tied down as low as possible, near the pots. You don't have to remove the main shoot in order for the plant to send up the secondary shoots. If the main shoot is tied down, you also cancel out the apical dominance and that will have the same effect as removing it altogether. You sort of trick the plant into believing that it's gone.

Still, topping the plant makes things easier because then you don't have to mind the main shoot at all. Doing so also gives you symmertrical plants.

The other option is super cropping. Then you just pinch the central stem and bend down the main shoot. You can continue super cropping as the secondary shoots grow taller etc. You just keep bending stuff out of the way and the plant finally grows into a large bush. This method has its benefits because you never remove any growth from the plant, you just bend it out of the way. Plants spend precious energy on every part that grows, so removing something, also means that the energy is lost.

Topping and LSTing is however a very simple method for getting bushy plants. If you prefer neat, symmetrical plants, then this is the option for you. Since you will only remove the main shoot, it's not a big loss but you have to top them early on, before they invest a lot of energy into the central stem and main shoot.

It's your call, really. Try the method that you like best.

I like topping and LSTing because I've gotten very used to it but I sometimes also super crop plants when they grow very tall. You can get away with at least 90 degree bends on the stems, sometimes more. The plant repairs the damage quite rapidly and it will also grow thicker in that location, like broken bones. You'll end up with these round "knuckles" on the broken stems. Sometimes female plants produce buds that are so heavy that the stems cannot support them, and they break under the weight. Keeping fans in the grow room is a good idea, because the stems grow thicker when they rock back and forth in the wind. Weak stems is only a problem indoors, which is why you sometimes have to give them additional support. Super cropping takes care of that problem to some degree, because the stems grow thicker when you break the inner cellulose network, and the branches can thereby support more weight.

Training is a relatively slow process, so you need to give the plants some time in veg and remain patient. Most regular indoor strains will remain in a vegetative stage until you flip the switch and change the light schedule to 12/12. In other words, you can keep the plants in veg for as long as you need.

The scrog net is a very handy tool indoors, especially if don't have room for fans. It provides support for the buds and also gives you the opportunity to redirect the shoots, so that they cover the entire grow area. You place the scrog above the growing shoots and then allow them to grow through it. You adjust the location of the shoots at the same time, thereby making sure that every hole in the net is occupied by buds.

Like this:

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You can also use string or gardening wire to support the buds but using all of these things together will give you better results. The scrog is handy no matter which method you use. I usually tie the buds to the scrog, for additional support and control. You can also tuck and tie fan leaves beneath the scrog, thereby allowing more light to pass down the the lower leaves, without actually removing any fan leaves. The fan leaves produce most of the energy that the plant needs, and they are also used to store up energy for later use. I've tried different approaches and leaving the fan leaves alone seems to produce the largest and healthiest buds.

As a matter of fact, the less you mess with the plants, the better they seem to do. I apply the training and when the work is done, I leave the plants alone. Nature takes care of the rest. I train them during the vegetative stage and sometimes early into flowering, but you should be done by the time the plants start putting on real weight. Then it's best to just let them do their own thing.

It's good to keep an open mind and to get creative while training the plants. You will find that most things will work in one way or the other. The plants will adapt to almost anything. I try new things all the time and the good plants always seem to bounce back. These plants grows extremely fast and they also seem to handle most things that you throw at them. Then ones that don't, weren't really worth keeping in the first place. You need to look for strong, stable female plants that can handle a lot of environmental stress.

I also use plant growth hormones to speed things up a bit. Basically we're talking about steroids for plants. They cause rapid cell division, cell elongation etc. You have to train the plants at the same time or they will get out of hand. Look for products that contain kelp/sea weed extracts.

Growth hormones can however mess with the sexuality of the plant, but only if the plant is genetically predisposed to the dual-sex condition. You can't turn a plant into a hermie because if it becomes a hermie, it was also a hermie from the start. It's genetic. Dioecious plants apparently evolved from more simple, monoecious ancestors, so the trait remains active in these plants today. All female plants (and some males) are more or less prone to this condition. Stable female plants will not turn on you, even when subjected to high levels of stress. That's the plants that you want. The more they can handle, the better. You then clone the good plants and grow them several times over. Later on, you might want to crossbreed good plants, in order to get even better plants.

The goal here is to create lots of shoots and frequent nodes. You usually end up with more shoots than you need, so you can pick the best ones and remove the rest. Usually, you'll need about 5-6 dominant shoots per plant. When the nodes are close to each other, they buds will eventually interconnect. They will cover the stems completely and you'll end up with basically one huge bud on each branch. That bud can grow extremely fat, the size of large soda bottles. That is why you have to train the plant, so that the nodes are frequent and not spaced too far apart. I also try to push the production towards the top shoots, by removing lower "pop corn" buds.

The amount of growth on a plant also determines the energy distribution. The lower buds will need some of that energy and that slows things down. By removing them, you also free up more energy for the top colas. By doing so, you enable them to grow larger in less time.

For now, I recommend that you keep things as simple as possible. Top, train, scrog and see how that goes. We learn new things from every grow and some things have to be seen, in order to be fully understood. So, you might as well focus on a few things and then deal with different scenarios, when they arise.
 

dr-stevo

Member
Thanks Kodiak for that very lengthy and informative reply. I have since experimented with topping, LST and fimming.

1. fimming - i think i cut in the correct place but i didnt get the expect results. The plants seemed to grow as normal but with the tips of the leaves cut off. I cut about 75% of the growing shoot on the main cola off.

2. LST - great results and plenty of tops. Plants are looking very bushy.

3. topping - all of the topped plants are smaller and less bushy than the LST ones. I topped low down above the second node and they grew 4 tops. I've since LSTed these. I have to start supercropping next because I'm growing in hydro and am running out of space to tie down the shoots. I'm about 2.5 weeks into veg.

When should I stop training the plants? They are quite bushy with numerous tops so I think it's a good time to switch to flowering. Is it ok to continue training during flowering?
 

Kodiak

Mad Scientist
Veteran
Hi dr-stevo,

Yeah. FIM topping doesn't always work. You can always top the plant a second time if you want, as soon as the secondary shoots grow large enough but once is usually enough when you LST.

Topping the plant will slow them down for a while, so the untopped LST plants would naturally grow faster. The topped plants will however catch up at some point.

Yeah. You can continue training the plants during flowering, if need be. You might not have to but keep in mind that they will stretch during the first two weeks of 12/12. Bushy plants don't really stretch as much as untopped christmas trees you still have to take that into consideration.

Sounds like the plants look ready for the switch. If they are large enough and have lots of shoots, go right ahead. You know best what to do here.
 

dr-stevo

Member
Thanks again Kodiak. I'm really contemplating on scrogging. Any advice on how high to place this? I guess the answer would really depend on the height of the grow room and lights. And when is the best time to start using this.
 

Kodiak

Mad Scientist
Veteran
Hey guys, I'm glad you liked the thread.

dr-stevo,

I find that it's best to keep the scrog below the topmost shoots, that will later grow into fat colas, thereby providing them with support. 3/4 up or something thereabouts. You can put it into place early but then you might have to raise it later on. Alternatively, you can install the scrog right above the canopy, say one week before 12/12, and then allow the shoots to grow through it as they stretch for the light during the following 2 weeks. Then the shoots ususally end up pretty much in the right place. You should guide the shoots into the holes at the same time, so that the whole grow area is covered in bud. It's also possible to put the scrog into place after the 12/12 stretch but that's more work. You can always adjust the height if need be. I'm sure that you will know what to do when you try it.
 
I didn't top this round because I have plenty of height and it got too bushy in the room I'm in, but I did gradually cut off 1/3 of the lower branches to get the top sites more energy. One of my plants, Strawberry Blue, is getting out of control in early flower. The 8 feet I have isn't enough to keep it far enough away from the lights. I have already bent(lst) many branches in the first week of flower, they have already shot up now. I am now at about day 14 from first pistils, day 25 or so from 12/12 switch. How late in flower should and can I be lst-ing in this way?
 
Yes Kodiak thanks for those lengthy replies. This is all work done by me as taught by great Kodiak. My first time with LST and I think I've done well. The 2l is a monster cropper. I think I need to start removing some of lower shoots. I was actually trying to tie the low ones down and out but I reread this thread and I think it would be best to remove lower shoots. View attachment 174424
Thanks again Kodiak for inspiring us and teaching me /us the way!;)

Sent from my C771 using Tapatalk 2
 
Last edited:

dr-stevo

Member
If you are cutting of the lower shoots should you leave the fan leaves? i read somewhere before that the fan leaves are essential for producing energy for the plants
 
If you are cutting of the lower shoots should you leave the fan leaves? i read somewhere before that the fan leaves are essential for producing energy for the plants

For me the entire branch goes, fans and all. I only do this to lower growth that has little to no chance of receiving adequate light. Yes, you do not want to remove fans if possible, but being the entire branch needs to go it's not an option. Currently 3 weeks into flower it is having no adverse effects. Even with my overnute issue I'm having tremendous pistil/bud growth for early flower compared to my past grows.
 

dr-stevo

Member
I've done my first supercropping with my current crop. I believe I am doing it correctly. I'm into my third week of flowering so I probably shouldn't still be doing it but I'm starting to run out height space. Anyway when I supercrop them I bend them 90 degrees. However they don't bend back up themselves which I thought they would have. Instead the stem stays vertical but the growing tip and all nodes on the bent stem grow upwards. I get the knuckle forming on where the supercropping was done but I had assumed that it would straighten itself up. Is this normal?
 

Kodiak

Mad Scientist
Veteran
Hi guys, sorry for the late reply. I just moved to a new house and things have been very busy. My answers will be short for some time.

MrGreenWeed, you can lst until harvest, if need be. You are not removing anything and it does not cause the plant much stress. Phototropism is always in effect, so the shoots will turn towards the light.

Yeah, fan leaves are important because they are the primary source of energy but keeping unwanted stems on the plant can cost more in upkeep. Find the balance.

Very nice plants mattkilla :yes: You could consider leaving the lower shoots alone for now and transplanting into larger pots. Extend the vegetative stage and you'll end up with monster crops from those plants. Continue LSTing and flower them when they get big. If space is an issue, train more horizontally as the shoots grow. Keep them low and wide. Anything is possible.

Glad you liked it HippyPunk :)

Yes dr-stevo, that is normal. The plant repairs the stem where it settles and it continues to grow from there. The knuckle strenghtens the stem at the breaking point, as the plant expands on the vascular tissue. The plant can usually repair bent and crushed branches, it even survives when the central stem is cut into four separate lengths, as long as it is still connected to the roots.

There very few set rules here, so try out new stuff when you get the chance. Chances are, it will work.

You don't even need string to LST, you just train the branches to make loops around each other, thereby keeping them in place.. or you can train it into a peace symbol, the plant will grow on happily.
 
What's the best strain to LST with? I want fat short bushes. I want a high yeilding indica but with a little bit of a sativa's fluffiness to play eye tricks with;)
I have 6foot cielings so I want to keep my end bushes at about 3 feet. I plan to use ten gallon containers and veg until they are spirals with branches sticking up.
When stretching occurs does it occur in both the main stalk that will be horizontal by the time I switch to 12-12 and the branches?
Is it possible to tie down banches to get shoots off of them too? So like if a branch was getting too tall could I change it in anyway to work with my room size?
 

Kodiak

Mad Scientist
Veteran
Hi Darklotus,

There are many strains to choose from and most plants do well with training. If you want short and fat plants, go with indica dominant strains. Take your pick. Chronic and Critical Mass are huge yielders that might fit the description. The original Blueberry is quite indica dominant but very fussy with nutes. You might want to take a look at the strains from Breeder Steve (Spice of Life), like Sweet Tooth, Blockhead or Blue Satellite. Check out Mr.Nice gear as well.

OG Kush, Bubblegum, Legends Ultimate Indica, Ingemar's Punch, Zombie Virus, Northern Lights x Haze, Master Kush x Skunk, Shiva Skunk/M40, Sensi Star, Shit, Purple Kush, ICE, MK-Ultra, Lavender, Mango/Papaya, Medicine Man/White Rhino, Warlock, etc. I haven't grown all of them but some might fit the bill, if you can find the right phenotype. There is some variance in every pack and some hybrids lean towards the indica side, while others are more sativa-like in expression. Every set of genes can give rise to almost countless variations. You can, for example, get plants with sativa-like buds on an indica frame, or vice versa. Apart from some very homogeneous and pure-bred strains, most seed packs actually contain a number of slightly different plants.

If you want to play it safe, pick a pure indica plant: Hash Plant, Deep Chunk, X18, Black Domina, Hindu Kush, Taskenti, Shiva/Durga Mata, G-13 x Hash Plant, L.A. Confidential, Maple Leaf Indica, Master Kush, Afghani #1, Mazar (Huge Indica), Sandstorm. You might also find pure indica phenotypes of Northern Lights.

Your plants will get huge with 10 gallon pots. 3 times regular size, I would say. That means a lot of training during veg. Not to worry though, you can shape any plant as you see fit, if you put in the work. Concentrate on horizontal growth, then scrog the plants for more control during flowering.

The apical dominance will be largely cancelled out when the main stalk is bent over horizontally, so most of the stretching should occur in the secondary and tertiary shoots. You will have to train them wisely or they will get out of control. You will need to extend the vegetative stage in order to make good use of the large pots. Take that time to train the plants properly and with care.

Yes, you can tie down any branch and by doing so, you will also encourage more secondary growth. You have to plan ahead though, because when the branches grow thick and woody, they won't be easy to bend without causing too much damage to the plant.

Watch the plants and do some training as things progress. Adjust here and there as the plants grow. That way, you won't run into any big surprises.
 
Thanks Kodiak! I'm glad you responded now my brain is doing that one thing again... oh yeah thinking:) I've still got a few more pieces of the puzzle to put together to complete my veg room so hopefully I'll have a chance to completely read this thread before I get my hands on some clones.
I am wondering if there is anyway to tell what pheno clones from a club will be?
 

Kodiak

Mad Scientist
Veteran
No problem DarkLotus :)

Yeah, there's tons of stuff in this thread, so check it out if you have the time. It will be interesting reading, if nothing more.

Your best bet would be to post a picture of the plant here and chances are someone will recognize the phenotype. You can tell if it's more indica or sativa just by looking at it, but there might be more than one pheno that look similar. One might, for example, have large yields, while the other has smaller yeilds but greater potency. The bud structure might vary or trichome density.. etc.

There's no way of telling how the plant will look during flowering when it's still in the vegetative stage.

I can tell you this much though, if the plant reeks in veg, it will get really stinky once the buds start to form.

You can also ask someone at the club if they can give you a short description of the plant.

If you can't figure out the lineage and the phenotype, just give it a new name. I make new crosses all the time and coming up with names for them is part of the fun. I usually have to smoke them until the final name comes to me. So in a sense, they name themselves.

K
 

GanjaAL

Member
Hay kodiak... was wondering what your thoughts on this, I have 3' max I can have the tops of my plants at under 1k bulbs... was wondering what would me the max height of tops before I make the flip?

Mind you that I most likely will let the screen fill out before the flip as well. thanks for a great thread... I just did not see this covered in it.
 
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