first year using black perforated plastic with soaker hoses underneath to grow seedless,sugar baby watermelons,cantaloupe and honey dew. I have 4 mounts in a row, the hose circles each mound twice,once around the bottom and once around closer to the top. I seem to have root rot or something,the leaves go limp and turn yellow then eventually brown, the stems still look green for quite a while. I treated with fungicide but I really think I over watered. I've lost 2 plants and others are following. Have I run the hoses correctly or should I run them differently? How often should I water and for how long?