Epiphytes or "Airplants" can live thier whole lives without ever being planted or watered. But you probably mean something else! It really depends on a whole lot of things and since you didn't provide any details, I don't have anywhere to start.
I planted a couple seeds 2 days ago but i have to leave at the end of next month for a month but i wanted 2 kno if it is worth still watering if they are going to die ne way and i also have seeds germinating can i still leave them germinating for a month until i come back
Germinating seeds will not last for a month, they will grow "wild" and then dry out and die. Go ahead and plant them in the ground so they will have a chance. If your babies are planted in the ground they have a much larger area to draw water from, soak the ground well before you leave. How well they will do for a month depends on how much rain you can expect. If there's no rain for a month, the young plants will be "a bit dry" (maybe a little stunted), but they should "survive" ok (as long as you don't live in the desert). If the weather is friendly and you get some rain, so much the better! Just look around at the surrounding area, is it normally green and lush or is it normally dry and scraggily? This is not the best way to care for cannabis but it is very hardy, why do you think we call it weed?
