I am new to this forum. I have gardened veg's / flowers / plants for most of my life, but ran into a problem with my tomatoes this year. I planted young starts from the nursery, about 3 / 4 different varieties that were disease resistant and tolerant to this zone (South Texas) zone 8b. We've had a lot of rain this year (very unusual) with cloudy skies but sun in between. I noticed yellow leaves at the bottom of each tomato plant and removed them. When next I checked there were more, so I sprayed with a fugal spray and a couple of days later with an pest spray. Still today I noticed a few more. Unfortunately I removed them before taking photos. I am looking for solutions. Someone on another site mentioned adding a weak solution of nitrogen. Where to I find this solution at ? or how do I make it ? Does anyone else have other ideas ?