The Q&A Archives: Tomato Disease

Question: My garden is in full sun, the tomato plants are staked upright yet the bottoms of the tomato turn black. Is it the soil, water, or lack of minerals in soil?

Answer: What you describe sounds suspiciously like Blossom-end Rot, a disease aggravated by widely fluctuating soil moisture, high temperatures, too much nitrogen fertilizer, and a deficiency of calcium in the soil.<br><br>Have your soil tested and adjust the soil to a pH of 6.5 to 7.0. Don't over-fertilize, don't plant tomatoes where drainage is poor, mulch the plants with organic matter to help retain moisture, and try to ensure uniform soil moisture by watering deeply once every 7 to 10 days, making sure water penetrates at least 12 inches deep into the soil.<br><br>Better luck next year with your tomatoes!

« Click to go to the homepage

» Ask a question of your own

Q&A Library Searching Tips

  • When singular and plural spellings differ, as in peony and peonies, try both.
  • Search terms are not case sensitive.

Today's site banner is by Char and is called "'Diamond Head' Sunrise"