What is Blossom End Rot (Tomatoes)

A common disorder in tomatoes is blossom-end rot in which the fruit becomes sunken and blackened.  This condition is caused by lack of calcium in the developing fruit. 

Over-watering should be avoided, however, because root absorption may be less efficient. 

 

Symptoms

Black and sunken rotted sections at base of fruit.

 

How to protect your plants

Blossom-end rot is aggravated by moisture stress in very hot weather, so regular watering and mulching of the surface will help control the problem.  An application of lime or gypsum (calcium sulfate) to the bed before planting will lessen the incidence of this disorder.

 

Plants impacted

  • Tomatoes

Recommended products

Yates Thrive Natural Dolomite Lime

A certified input for organic gardening, that contains natural dolomite lime (calcium and magnesium carbonate). to gently raise the pH of acid soils.

Yates Thrive Natural Garden Lime

A certified input for organic gardening that contains natural lime (calcium carbonate) from Te Kuiti, in the King Country, to adjust soil acidity.

More articles

Early Blight

A fungal disease that affects tomatoes, capsicums, eggplants and potatoes. It reduces plant health and vigour, and can cause plant death.

Tomato Fruit Worm

If you find holes bored into your tomatoes, the culprit may well be the tomato fruit worm. Here's how to identify it, then get rid of it from your garden.

Corn Earworm

If the kernels of your corn cobs are being chewed away inside the husks, it sounds like you have corn ear worm at work. Here's how to identify them, and how to control them.

Powdery Mildew

A fungus that spreads a white or ash-grey film over the upper and lower surfaces of the leaves of plants - usually the older leaves.