Home > Question >

What is making the base of my tomatoes turn black?

Our Advice:

This disorder is called blossom end rot and is caused by erratic watering, calcium deficiency or both. Treat the plants with a solution of calcium nitrate. This will not cure the affected fruits but will help to stop newly-forming fruits being damaged.

Gardening Expert: Steve Bradley

Here are some related questions:

Not what you are looking for?

If you can't find what you are looking for on the website then you can ask one of our experts. To get in touch with us Click Here

We will try to get back to you with an answer as soon as we can.

Here is some more information for you:

Did you find this answer useful? Subscribe to our newsletter for gardeing news, projects, special offers and competitions.

Ask another gardening question:

Learn More About Pests and Diseases

Gardening Projects for February

---

How to pH Test Soil

How to: Maintenance Pruning

How to Prune

How to take Hardwood Cuttings

Latest Gardening Videos

---

Five Essential Tips for Growing Lemons

5 Essential Spring Bulb Tips in 1 minute

Why are there brown / black marks on my Hellebores?

How to Grow Orchids

How can I get rid of a red ant nest in my lawn?

How do I insulate my greenhouse?

All Videos

Explore Gardens from Around the World

Majorelle Garden
Marrakesh, Morocco

Nongnooch Tropical Garden
Pattaya, Thailand

Powerscourt Gardens
Enniskerry, Co. Wicklow, Ireland

Pamplemousses Botanical Garden
Pamplemousses, Mauritius

Eram Garden
Shiraz, Iran

Koishikawa Korakuen Gardens
Tokyo, Japan