Plants 1-1.5" in 16 oz solo cup. Should I transplant?

When should I transplant them, and what size container should I use next? I only have 2 feet of vertical space, so I figure I should use a 2 gallon container, but I think my plants will be over 2 feet when I'm done (Gonna LST).

bump. anyone?

you want to transplant to a bigger container at least double in size. You can keep a plant in a solo cup up till around 4-5" of rich growth. If all you have is 2 feet of room a 2 gallon pot would cut into that greatly, I would try a 6x6x6 pot and start flowering before the thing gets bigger than 1.0ft

i would wait until you are about 6" to transplant...but i would cut that 2 gallon container in half and flower a week later or after it has rooted since you only have 2 feet