Can the plant survive for 2,5 days without watering?

Search for wick watering. You can rig something to give it some water while you gone.

well... i give 1L very two days 😅 i guess my plants could survive over a week without water but that would sure hurt them

Hello mates, i advice you to be carefull with the organic product, all the matter you give that the plant don't be able to absorb, will stay in the soil. if you conitnue to feed every other day you will risk an overfeeding. Anyway you can give the water with the nutrient the last day before you leave and they will be fine. If you are very worry about you could give water with the saucer system, you put the water in the saucer and let it absord from there. Good luck and happy journey!

if it doesn't dry out in 3 days, sure. just need a big enough pot.

In soil easily 3 days, only if you have a giant plant in a small pot i wouldn’t recommend. Drought stress is actually even beneficial during week 1-3 of flowering and later at the ripening stage you want to have more dryback than in Veg and Bulk. Even if they are hanging a bit looking droopy when you return, give your normal amount of water and they will recover, get back up in a short time. You can give her a bit more than usual before you leave, but don’t give her more than usual when you come back

I grow in biobizz light mix and its usually 3 days between waterings. Just make sure you completely saturate the soil before you go away, if you get plenty of runoff then it's soaked.