Black tips on my tomato plant
My tomato plant was planted in my outdoor garden bed about two months ago. About three weeks ago I noticed the tips of leaves turning black. I plucked all of those and the remaining have also grown to have black tips. The plant is producing and the stems look healthy. Is this blight?
I water deeply twice a week and fertilize occasionally. The planter faces south and gets plenty of light. It's about 2x5x1.5 ft and I give it two gallons every three days. The soil was fresh but I did plant a tomato that had mysteriously grown in the pot of my corn plant (I figured a bird had dropped it). That plant also got black tips and I removed it from the planter as I thought it may have some disease that was spreading to my other tomato. I have a third tomato plant in the planter that does not have these black tips.