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Roses: Why yellow leaves on healthy rose?

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LAS14
Albany, ME
(Zone 4b)

July 3, 2012
8:56 AM

Post #9191234

I have yellow leaves on one section of my most vigorous rose. It's definitely not black spot or any other fungus. The leaves look healthy, and haven't changed over several weeks. It's just that they're yellow instead of green. Any ideas what this might be? Note. The rose lives on the edge of a compost pile. That's why it's my most vigorous one, I'm sure. It's a Climbing Dublin Bay.

TIA
LAS

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porkpal
Richmond, TX

July 3, 2012
9:22 AM

Post #9191268

I can't tell from the pictures, but if the veins are green in the yellow leaves it could be an iron shortage. Why that would affect just part of the plant is beyond me.
LAS14
Albany, ME
(Zone 4b)

July 3, 2012
9:49 AM

Post #9191316

Yes, they are green. What does one do about an iron shortage?
porkpal
Richmond, TX

July 3, 2012
11:36 AM

Post #9191467

Fertilizer companies sell iron supplements. I can't think of the name of any at the moment. I think that high soil pH can also make iron less available.

happytail

happytail
St. Simon's Island, GA
(Zone 9a)

July 5, 2012
6:30 PM

Post #9194621

Ironite is a readily available granular or liquid iron.
dwendt
Byron Center, MI

July 17, 2012
9:10 AM

Post #9208725

For the first time this year I have the same problem with only one of my roses--"Gertrude Jekyll." No black spots, only yellow leaves. I have been using Mills Magic Mix in the ground and fish emulsion as a a foliar fertilizer. However, I just started using the foliar application since the yellow leaves already had appeared. Do you think I still need some liquid iron for just that rose bush, anyone? Thank you!

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