dwarf macadamia (forum)

lazza32 starts with ...
Hi,
i have a dwarf macadamia and live in perth. The leaves are constantly going brown and dropping off I am quite concerned that it may not last the end of summer. Is this just because the heat over here in perth is constantly 32 degrees and over during summer and is burning the leaves or does someone else know if it is a different problem?
I bought it from daleys and the initial instructions they give you is to pur it out in full sun like on there property. My tree get's around 8 hours of sun a day (at least).

Time: 21st February 2009 9:42am

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About the Author lazza32
perth
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Wayne says...
Macadamia nut, originally known as Queensland nut Lazza is used to such heat. The tree might be de-hydrated, how old is it.

I was thinking along the line of anthractnose disease but I don't think it effects this nut tree, but I could be wrong. It wouldn't hurt to give it a spray with a copper antifungal spray and then a seaweed watering over the leaves [provided it's a small tree] but make sure that you do all your spraying in the cool of the evening

Good luck

Time: 21st February 2009 5:28pm

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About the Author Wayne
Mackay
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Jon says...
From what you've said it sounds like it's just the heat burning the leaves and causing them to fall off. Same happened to a lot of plants here in Melbourne when there were 4 or 5 days of 40 degree plus temperatures. I recommend shading it with cloths, sheets, shade cloth etc, and maybe some extra water.

Jon

Time: 21st February 2009 5:29pm

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About the Author Jon
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Wayne says...
I think you are probably right Jon, even though it is hotter up here it is more humid, I understand it is very dry heat down your way.

cheers

Time: 21st February 2009 5:55pm

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About the Author Wayne
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SlickMick says...
I would be inclined to have a look at the soil into which the tree is planted. If it is a sandy medium then this may be your problem with water clearing from the root ball quickly and limiting the moisture uptake by the tree. If this is the case you should get the area out past the drip line mulched thickly to try and prevent moisture loss to the atmosphere. The other thing worth doing if you have a sandy soil is to get plenty of organic stuff into the surface arount the tree. Mulching should help with this.

Time: 21st February 2009 9:15pm

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