Size of our pot

If they are autos, which three seem to be, straight into the final big pot is the go, that way you avoid "transplant shock" and the roots have unrestricted growth from day one, which is vital when growing autos and to get them to their biggest size before flowering commences. Starting autos in small pots can cramp root development and lead to slower/smaller growth quite quickly, meaning the plants will be smaller when they start flowering, which obviously means smaller yields too. Photoperiod plants are ideally started in smaller pots, about 4 inches across and 5 inches deep is ideal, and this is enough room for the first 3 weeks of growth, before potting them up. Whether you then put them into their final pot like I do or into an intermediate pot as some others do, is up to you. If you are less confident with gardening, the fewer times you have to transplant, the less opportunities there are for something to go wrong. Personally I can not see any degree of difficulty whether I am watering a plant in a small or large pot. I hope your "custom Do Si Dos" seed is an auto as well, growing auto flowering and photoperiod plants in the same tent will cause all sorts of problems. A photoperiod plant will not flower at 18/6 and your autos will not flower properly at 12/12, which is what you will need to switch your lights to to get any photoperiod plant to flower. Leaving a photoperiod plant at 18/6 while waiting for your autos to finish flowering will lead to the photoperiod plant becoming tree like in size/stature. If you only have one grow space indoors, growing either all autos or all photoperiod plants is the only logical option. Hope this helps, .............. Organoman.