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OK, OK, Remember folks, some of us Texans have had the hinderance of being educated in the state ranked 49th on the Verbal SAT & 46th on the Math SAT. (thanks rick)
We aren't dumb, just undereducated and defensive when we don't understand something.
tb26
It seems to me you are overthinking this.
Remember this method is generally for people with limited grow space and that want to wait for sexing to devote more soil & space to the females.
And is based on the fact that autos like to go down with the tap root and then develop branch roots.
If you have the room to start off in tall pots, go for it.
1. Cut very bottom out of 1 party cup A.
2. Poke drainage holes in party cup B.
3. Place party cup A inside of party cup B.
4. Place soil inside of the nestled party cup combination
5. Place seed in soil.
6.Allow 2-3 weeks growth, during this time tap root will grow down, some few branch roots will develop.
7. After the 2-3 weeks of seedling growth, slide party cup B off of party cup A very carefully.
* (you may be able to see tap root and some branch roots in the soil visible on the bottom of party cup A)( in the original 1party cup method, cutting the bottom of the cup could lead to accidental injury to the tap root, causing shock, so the 2 cup method was initiated to remedy that problem.)
8. Now in your larger pot that is filled with soil, dig a hole about 2 inches deep and place party cup B (along with it seedling) into it. Most of the cup will be exposed.
*This will give your seedling a chance to send its tap root deeper into the soil of your larger pot. As it does this, it will begin to send branch roots out creating the rootball you are worried about hindering.
Again, all this is done mostly to accomodate growers with limited space considerations and to give the autoflowers the room to send their tap root deep, as the length of the tap root is as important as the width of the root ball.
Just like my wife, they want
length & girth. (It is good that I was able to provide what she required)
Lastly, patience is good to exercise. I have been lurking on this site for months and reading many of the grow threads post by post. I have found most of the theoretical answers to my questions just by reading through them. It takes time, but once my grow commences, most of my questions will be specific to my grow or situation rather than theoretical.