Biodegradable Bag Use?

Did you tell them you planned to grow cannabis in the bag or did they offer that advice thinking you were growing a normal pot plant that may live for a few years? Be careful getting advice when you don't disclose all the info to the person giving advice. ;) IMO any barrier is not a good idea, weed's lifespan is short and making it's time easy normally helps you out. While it probably won't be a problem for photoperiods, it's solving a problem that already has a few other great solutions like 0011010101010111 said.

use em as a pot liner. and if going to use them as is. need to use a few sizes up as the sides dry out real fast. almost need to wet the sides daily. They are normally made from post consumer plastics and don't really biodegrade but breakdown into micro plastics. unless they are the ones made from wool or other natural fibers. but that shit takes a while to break down. I find any pot that you bury is kinda bogus, not unless the plants growing in it has a super aggressive root system. seem em made out of peat or coir or fabric, if anything they are nice to shred and use as mulch after but I don't trust em in earth to do their job and break down. other option is cutting the pot a bunch but at that point just remove it.

Used them a few times.........never again. Dry out too fast, need to be constantly wet to let roots through, if slightly dry, roots don't get through easiliy........issues, issues issues. While they might seem like a good idea, in my experience, they just don't work that well. One time, planted them in dryish soil, had no real root penetration after 14 days and stunted some seedlings badly. I would advise against using them........plastic pots work perfectly well and if you are careful, you will have zero issues transplanting the seedlings.

There are also velcro fabric pot bags that makes potting up easier. Could use those polyfilm bags - rather cheap. Then, you just cut the bag off etc. It's probably fine. roots will grow through some pretty tough material, but that doesn't mean it is without some minimal to larger negative effect. Might be irrelevant to 100days of growing, but potting up isn't something that should be difficult to do, so why not avoid the potential negative effect? Removing a plant from a smaller pot shouldn't be a difficult task. Even without the gimmick options above and using normal nursery pots. If rootball falls apart, probably doing it too soon or while the medium is too dry. Roots should be developed enough to hold it together.. should do it when the medium is at least moist and not bone-dry. you probably do an initial irrigation after transplant anyway, so getting it wet before is no big deal even if a little out of sync with normal irrigation timing. Same reason you shouldn't use huge chunky aeration amendments like wood chips are extra coard perlite... makes the roots work harder for absolutely no reason. is it noticeabel to the naked eye? no, but the fact is it is expending more energy than normal, which does reduce growth potential. You just may need a large sample to recognize it.