I have started 4 plants indoors and plan to move them outside june 1 to 30 gallon smart pots. The big kicker is i have to leave for a month and am unsure if the 3 gallon pots they are in now will be big enough to carry them till they go in 30gallon grow pots outside. They are about 16 to 18 inches tall now. I added a picture for reference. Should these plants be ok till june 1 in 3 gallon pots? Thanks