Blackberry Plants
Q.

What causes gray to black to brown decay starting in the center of my blackberry leaves between the veins?

Zone 23235 | wdstevens1@yahoo.com added on August 6, 2019 | Answered

Canes are in good condition and I don't see any insect damage. The damage is on my thornless variety primacanes grown in hot and humid central Virginia. Images show the progression.

A.
A.Answers to this queston: Add Answer
BushDoctor
Certified GKH Gardening Expert
Answered on August 7, 2019

That appears to be a severe calcium deficiency! This can be resolved quite easily, though.

DOLOMITIC LIME will provide, both, calcium and magnesium to the plant. Adding IRON SULFATE will help acidify the pH of the soil from treatment, as well as provide sulfur, iron, and is a good preventative for fungal infections.

This article will help you to care for Blackberry plants: https://www.gardeningknowhow.com/edible/fruits/blackberries/growing-blackberry-bushes.htm

00
Was this answer useful?

Log in or sign up to help answer this question.
Did you find this helpful? Share it with your friends!

You must be logged into your account to answer a question.

If you don't have an account sign up for an account now.

Looking for more?
here are more questions about...
Blackberry Plants
Join Us - Sign up to get all the latest gardening tips!

Do you know a lot about gardening?
Become a GKH Gardening Expert

Learn More