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Herefordshire
Felushi
May 8, 2018 2:08 PM CST
I have a beautiful clematis Montana which stretches across my 10 feet wide trellis but over the last few years, on one side the flowers have turned yellow while the rest is still pink (the original colour ).I have had the plant for about 25 years, is this normal?
Regards
Evelyn

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Name: Kyle
Middle TN (Zone 7a)
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quercusnut
May 9, 2018 6:04 AM CST
Could it possibly be a self-sown seedling you didn't notice until it bloomed? That's one possible reason for a change in flower color.
Name: Arlene
Southold, Long Island, NY (Zone 7a)
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pirl
May 9, 2018 6:12 AM CST
I think Kyle must be right. I've had it happen with a Jackmanii but not the montana.
Name: Kyle
Middle TN (Zone 7a)
Region: Tennessee Plant and/or Seed Trader Cat Lover Dog Lover Roses Ferns
Hostas Foliage Fan Bromeliad Heucheras Native Plants and Wildflowers Birds
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quercusnut
May 9, 2018 6:26 AM CST
My C. viorna reseeds everywhere. It is weedy but I love it. Less so my C. crispa but quite a bit. I even have seedlings from some named cultivars.
Name: Sharon Rose
Grapevine, TX (Zone 8a)
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Altheabyanothername
May 9, 2018 12:12 PM CST
The only other explanation would be if it was grafted. If purchased from a nursery as a blooming sized one it could have been grafted. With age the other one surfaced, which happens with older grafts. I have no clue as to why some clematis would be grafted. They are roots. But if it did not come from a nursery potted I would agree with a seedling getting in there. A seedling can also take years to surface.

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