Pics would be awesome but first, I think you need a LOT more drainage. It sounds like possibly you have root rot from overwatering. BUT it's hard to say wihtout pic.s
Also, you should not grow multiple plants in one container.
Repot each into its own pot and allow the soil to almost dry out between waterings.
stinkyattic Reviewed by stinkyattic on . first time grower probs. need advice!!!!!! let me start with what i have. 3 plants in a large soda cooler with a built in drainage hole and i would say the whole cooler is about 10-12 gallons. filled it up with possting soil and transplanted 3 plants which are from about 10'-13' tall. i mixed about a third bag of miracle-gro all purpose plant food. the plants looked good until i transplanted and mixed in fert. my plants overall look alright but sometimes the leaves look droopy and curl up and down. also one of the leaves on one of my Rating: 5