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Recently I've seen my Elderberry trees develop some yellow leaves and I don't know what the problem could be or how to fix it, so I'll leave a picture if anybody can help me.

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  • Has the tree produced new growth that looks healthy (I think that's what I can see in a couple of places, but not sure) or does it start out healthy and then change to yellow patchiness? Do you expect it to lose its leaves shortly due to autumn/winter? Any problems on the trunk or branches?
    – Bamboo
    Dec 4 '17 at 21:36
  • I'll have to look further on the new growth and the trunk and branches really and I don't expect it to loose it's leaves because I live in the tropics. Dec 5 '17 at 4:35
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    A Sambucus in the tropics? How long have you had it? And are we really talking about *Sambucus nigra or something different?
    – Stephie
    Dec 5 '17 at 5:07
  • @Stephie - Bogota has a 'sub tropical highland' climate rather than tropical.. wasn't sure what that meant for temperate zone deciduous plants, if it really is a Sambucus...
    – Bamboo
    Dec 5 '17 at 12:02
  • Thank you @Bamboo for the climate correction, I do live in Bogota and it is a Sambucus nigra. Dec 5 '17 at 14:45
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I must say that while this plant has a leaf like Sambucus the bark does not look right. It should be brown and corky with light speckles on old wood, bright green on new wood with longitudinal ridges, not smooth dull green as in picture. A distinctive characteristic of Sambucus is the hollow stems. Cut a piece off and examine inside the stem for a hollow space except at the nodes where it tends to fill in.

The yellow resembles magnesium deficiency. Epsom salts applied as a foliar spray in a test area, if it produces a quick response, might be a test for this.

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