Got problems with the plant

my topper 2 sets of leafs are curly and looked really f**ked.did i give it overdose of ferts (20-20-20 every 2-3 days).

over watered? too cold?

@ day 29-30 ; @ night 15-17 (Celsius)i don't think i've overwatered it

ur feeding wayyyy 2 much...i only feed once a week,,,, looks like overfert, are the tips of the leaves browning?

no they are not brown.should i flush it?? and how??

depending on how large the pot is....its a 2:1 ratio.... 2gal of water per gallon.....flush until the waste is coming out clear from the bottom and not yellow....after u flush it give it 1/4 strength nutes......... wait until the soil is dryyyyyy before watering it....Marijuana loves water and food and will eat as much as u give it... lots of water but not too often. also letting the dirt dry out triggers the roots to start searching for water which is good.....

if i fert it for the last time one day ago, should i wait 1-2 day(s) before flushing

i use the fertilizer for about 5 or 6 waterings

ya,,,,,flush it and give it nutes sunday or monday depending on soil dryness....if its time to water it....after i flushed mine, it took like 4-5 days before the soil was dry again....just use the finger method. 2in down. dry=water. damp= let go an extra day or 2

yesterday i flushed it and now I'm waiting to see what happen