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Foliage problem - your thoughts?

7 years ago

I have a group of 4 James Galway planted together and this spring one appeared to show signs of iron deficiency on the lower 25% of the leaves. I applied Iron Tone as I have done in the past with good results but there was not change after 6-8 weeks and so I reapplied it. Still no change after another 6-8 weeks. The leaves have curled some now. This has now appeared on another James Galway next to it and on a Clair Austin 8-10 feet away. Any thoughts?

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jim1961 / Central Pennsylvania / Zone 6

7 years ago

last modified: 7 years ago

Sorry your having these problems Dave... Anything get sprayed on those certain roses???

Get alot of rain? Or any extreme weather conditions?

What I did here was get a professional soil test done that told me what nutrients were available in the soil and the important PH level etc....My problem was the shredded wood mulch I was using was keeping the soil to wet in our climate and that was causing me problems... So after removing the wood mulch and only using 2 inches of yard compost for the past 3 years has made a big difference...Not saying that's your problem you just have to figure out what changed... Your soil, insects, maybe spray drift from somewhere, weather conditions, etc. etc.

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Comments (10)

Buford_NE_GA_7A
7 years ago
I have that on a few roses. I think it's sunburn.
Dave5bWY thanked Buford_NE_GA_7A
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steve_gw
7 years ago
did you check for spider mites?
Dave5bWY thanked steve_gw
Dave5bWY
Original Author
7 years ago
Jim - I really do need to have my soil tested to see where it stands. I had to completely excavate the holes my roses are planted in d/t the awful clay I have here and I added a layer of drainage rock and then were planted in a mixture of compost, peat moss, and very little of the top layer of fertile clay. My mulch is s thought. JG was sprayed with horticultural oil in early spring but nothing since - good question - sorry I forgot to mention this. I don't remember having hot or very cold weather after spraying.

Buford - Sunburn is also a possibility. Maybe with spraying it with horticultural oil it caused this. Only 2 JG and one Claire were affected but it is definitely a thought.

Steve - This spring was awful for spider mites with the hot/dry weather but JG was not one that was affected. Other's sure were.
jim1961 / Central Pennsylvania / Zone 6
7 years ago
I hope you get it figured out Dave!
nanadollZ7 SWIdaho
7 years ago
I think the roses are deficient in an element, perhaps. It's not iron, but manganese (maybe). Have you been doing a lot of watering, or has there been lots of rain lately? Diane
nanadollZ7 SWIdaho
7 years ago
I did some checking, and your roses' leaves do have the look of manganese deficiency--yellowing between the green leaf veins, and browning at the leaf edges. Diane
Moses, Pittsburgh, W. PA., zone 5/6, USA
7 years ago
Those look like old leaves. What does the new growth look like?
Dave5bWY
Original Author
7 years ago
You may be right on that, Diane.

The new growth looks fine but the old growth not so much - although it appeared when it was new in spring. $20 for a soil test and where all of my rose holes have similar but little different soil composition and some given different supplements I'm not sure if that'd be worth it. I wish there were a reliable home soil test that provided more info than NPK and Ph.
nanadollZ7 SWIdaho
7 years ago
Do you have alkaline soil, Dave? Those with this kind of soil have more trouble with iron and manganese deficiency. Diane

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