Ok so i have 4 different varieties of tomato plants going right now and all are fruiting and have been for a while. All of them are doing good except for my Roma's( which btw are my absolute favorite kind of tomato). On the bottom of a good number of the Roma's there starting to turn brown and look nasty. Im not over watering, im using really high quality organic soil and im using a bat guano nute every 4 to 5 waterings. So im definatly not over feeding them nutes. Any in put would be great as i dont want to see my favorites go to waste after all this time and work iv put in.