I have recently put my hands to gardening and currently have squash, strawberries, cucumber, etc but on my squash the leaves are beginning to brown and crisp at the edges eventually leading to the whole leave going yellow/brown and looking crisp and dead. I water these plants every day and they get about 6 hours or so of direct sun. Am I doing anything wrong? I have been cropping the leaves to make way for the newers ones coming through. Any help would be very much appreciated.