Let me try to point ya in the right direction Schuyler. All plants start with opposite nodes. But once they are mature, they will alternate. I think what you are referring to is early plant training, such as topping at the 4th node, or, in your link, mainlining, or another term, lst. Early training should be done while nodes are opposing, this will keep a plant grown from seed more uniform. But as tthe plant ages and becomes mature and ready for flower, the nodes become alternating with 99% of mj plants.I'm sure there are plants that don't have alternating nodes, but it's not something you can get by using a certain strain. It's just a genetic defect that you may find with a runt plant out of 1000s of plants from the genome. Here is an example of early training and mainline that I have done with a plant. The even node structure makes it easy to mainline, though all plants can be scroged, topped, mainline, fim, or supercrop. Hope this helps.
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