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Anna, TX (50 miles north of Da
Jun 13, 2020 6:55 PM CST
We bought this little blackberry bush and it took off all spring and even in north Texas sun, but now with the constant heat and no more rain, this little one has started to turn red/brown. Does this mean there is a deficiency in the soil or that it's getting too much sun? We live in zone 8 and the plant has morning/afternoon sun and is in a 1/2 whisky barrel
Thumb of 2020-06-14/Sarakay13/8eb3ec
Thumb of 2020-06-14/Sarakay13/86e4c8

Name: sumire
Reno, Nevada (Zone 6a)
Jun 13, 2020 10:12 PM CST

How often do you water the barrel? How much do you water? It looks like sun stress to me, but lack of water sometimes looks similar.
[Last edited by sumire - Jun 13, 2020 10:15 PM (+)]
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Name: Luis
Hurst, TX, U.S.A. (Zone 8a)
Dog Lover Region: Texas Salvias Roses Hibiscus Plumerias
Jun 14, 2020 1:42 AM CST
Because of the red color in the leaves, I would check for magnesium deficiency and add either Epsom salts or magnesium sulfate.
Name: one-eye-luke US.Vet.
Texas (Zone 8a)
Quitter's never Win
Hummingbirder Birds Organic Gardener Dog Lover Cat Lover
Jun 15, 2020 8:40 AM CST
You have it planted too deep in the soil. Remove the top 1 or 2 inches of soil off the top and allow it to dry out for a while.
NOT A EXPERT! Just a grow worm! I never met a plant I didn’t love.✌
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
Jun 15, 2020 3:01 PM CST
Unless you found your potting soil in a third world country, there is no magnesium deficiency. Don't add Epsom salt.

You could bury the entire blackberry plant and it would root all over the stem and pop up in more places.

Those are stress colors but, I suspect this stress is caused by too much sun and lack of water. Blackberry bushes can handle too much sun if they have enough water. The newest leaf looks better. Is it shaded? Are you keepig the soil moist?

Wild blackberry bushes are always found along creeks, and rivers and near ponds or growing on seeps. They like water.
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Name: sumire
Reno, Nevada (Zone 6a)
Jun 15, 2020 3:02 PM CST
I agree
canada 4b (Zone 8a)
Jun 15, 2020 3:32 PM CST
The blackberry bushes we have come in 2 stages. This year's green lush and non productive stages (next years berries) and this years productive but nasty tattered stage. They remind me of a salmon giving its last energy to swimming upstream for spawning and then dying. Calcium Nitrate now in June after the berries are gone and 13-13-13 in the early spring is all we do.
Name: Lee-Roy
Bilzen, Belgium (Zone 8a)
Irises Lilies Hostas Ferns Composter Region: Belgium
Lover of wildlife (Black bear badge) Region: Europe
Jun 15, 2020 3:57 PM CST
You practically answered your own question: no more rain.

Give it some, end of story.

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