My banana plants stopped growing -help please
 

Hi,

I planted them half year ago and grews very well and fast during that time. Also looks very healthy.
In the last 1-2 months they have started to slowing down their growing rate gradually.
Now they have stopped growing at all.
Some of the new fold leaves started to get curved a little bit. and that leaves didn't unfold 100% and I unfold them myself.
The leaves also have yellow and brown edges (look at pictures).
The temperatures does not drops below 20 degrees celsius right now.

This is the worst leaf:




Another ones (this is normal?):








General images of the plants:




I tried 20-20-20 all purpose fertilizer. but it didn't help.
Does anybody know what the problem of my plants?

Thanks.

Re: My banana plants stopped growing -help please
 

Great looking plants....