To grow vegetables such as baby tomato plants in tubs, fill the tubs three-quarters full with clay pebbles, dip the tubs in water and then add the right amou… Question by That is absurd. Cook baby cook!: What to do about brown circles growing at the bottom of my tomatoes? I am growing tomatoes in a topsy turvy. After my tomatoes sprout, they began to grow a large brown circle at the bottom of them. What shall I do? Help! Best answer: Answer by winterrulesIt’s called blossom end rot. The most common cause is lack… Read Article →