Bag seeds (I assume wedding cake)

Missed last week but managed to sort the problem with the leaves browning - swapped from rain water to tap water (minus chlorine) and added some banana peel into the soil to try and increase the potassium long term (suggested by a friend). Not sure how long they need to veg for as they where random seeds, any advice welcome. However they have got a while to go before I get to flowering size wise