Which Pots for 6 Weeks Vegi?

YES. 2L pots are too small pal You've lots of space to bring your 4 pots to the edge.. 9-11L pots.

YES. 2L pots are too small pal You've lots of space to bring your 4 pots to the edge.. 9-11L pots.

if in soil, there is some added beneift to more transplants than what i do in soilless.. context wil matter. each time you transplant in soil you basically give it a recharge of nutes with the new volume of substrate.

I use 2.5" seedling pots, then 1gallon pots up to FD21-25 or so. Then into 5-gallon pots. I do 35-42 days of vege. The 5-gallon pots are probably a bit too large, but a 3-gallon might be a tad on small side. If soilless/hydro, less of a problem in a 3-gallon than in soil. they way they measure these pots is messed up -- sometimes it's referring to compressed volume. So, my 5-gal is tapered but 11.5-12" wide at top and about 11" tall. Think 10-10.5" wide at bottom. I see lots of roots on side, but nothing wrapping around at bottom. Slightly smaller would be great, but i don't see that option nearby. Most of flower requires daily irrigation due to rate of drinking.

yes, but transplanting can be a strss for the plant, specially for the root in hydro...

Should work if the pot is grown full with the roots otherwise the soil breaks and the roots breaks evtl by transplant..