The only time my corn leaves turned brown was when I was away and couldn't water them, I was only gone one day! But also the leaves rolled too. My planting is pretty dense for corn at 4" apart on center. Mine are also pretty shallow only in 6-8" of soil in an earthtainer swc.
{{gwi:48190}}
{{gwi:48191}}
I added the two bricks to keep the pot from tipping over in the wind!, there is also a hibiscus bush on the otherside to catch it too!

Thank you I will try watering them much heavier. I am away from home during the week and I think My mother puts too little water on them!!
Thank you for your help.
Dermot