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redtitan

Black leaf tips of Melaleuca and Eucalyptus

17 years ago

Hello,

This winter I had to bring in my tea tree plants (Melaleuca alternifoila) along with my Eucalyptus plant (Eucalyptus gunnii) inside from my greenhouse due to a really low winter temperatures. They seemed to be doing fine at first, but then the leaves on the tea tree plants, particularly the newest leaves, started turning black on their tips. It seems to be getting worse, although a few of my tea tree plants seem unaffected. The new leaves on my Eucalyptus plant are starting to shrivel and darken and I think it's having the same problem. My thoughts are that they might not be getting enough light since they're indoors (but I'm not sure why only the new growth of the plants would be affected) or they might be getting too much phosphorus (but they've been in the same soil for a long time and I'm just noticing this problem now - plus I heard eucalypts and melaleucas can handle more phosphorus in the soil). I looked online at deficiency problems as well and I thought they might be having a problem with calcium deficiency, since the soils here in Washington state tend to be low in Calcium, and I added crushed up oyster shells to the soil. One of the plants actually started doing better but another is doing worse, so I'm not sure what to think. Have any of you seen this problem before and have an idea as to what it could be?

Here are some photos of the plants:

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-Adam

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