What's your question? Ask

Blackberry Plants

Q.Thornless blackberries

Zone So cal | Bnodie added on June 30, 2015 | Answered

I have a really huge planter that I have put blackberries in. I have had it now for three years and only blooms on one branch. It is in direct sunlight. I turn the pot and water till it comes out the bottom. I cut the plant down to the roots and still only get berries on one branch. I use an organic fertilizer and sometimes put in coffee grinds. What am I doing wrong?

A.Answers to this queston: Add Answer
Answered on June 30, 2015

The container size should be at least 5 gallons or larger. The wider the better.

You should provide a trellis for support.

They will need more frequent watering, check the soil daily and water when the first inch of soil is dry.

Nutrients are washed away with all the watering so you need to provide a complete balanced fertilizer regularly.
A slow release fertilizer can be used in early spring, or use regular fertilizer once a month.

They will need regular pruning and training.
Divide the plants every couple of years, when they are dormant--in the winter.
This is a good time to replace the soil also.

If you see a white crust start to form on the top of the soil, give the pot a good rinse to help rinse all the built up salts.

If you have been fertilizing heavy in order to try to encourage fruit, the soil may have to much nitrogen.

You can try adding some bone meal to add phosphorus.


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