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Avocado leaves going brown

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Anna B starts with ...
Our avocado Hass trees leaves are going brown. It's been in the ground for 3 months now and has a shelter to protect it. Is this normal? Will they fall off and grow new?
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Anna B
Ferntree Gully
15th August 2017 4:41pm
#UserID: 16688
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BJ11 says...
Leaves can go brown for several reasons (and a picture will help identify why).
Cold winds and sunburn can damage leaves and turn them brown - but I presume your sheltered area would protect the tree from these things.
Similarly if you say it is Hass then it is probably grafted and not a seedling (so isn't just a 'dud' seedling).
Old leaves browning (typically from the tip) might be due to salt burn. This would suggest there is too much fertiliser in the soil.
Spots of brown might be due to salty water, or fungal infection (although the latter are often black).
Make sure mulch is away from the trunk of the tree to prevent any risk of collar rot impacting - this may also show up as sick leaves.
If the leaves are discoloured as well then it could be a deficiency - consider calcium and potash.
It is also possible the tree is going through a natural 'shed' of leaves - if there is loads of new growth and the leaves just look 'old' then it might be dropping and replacing its leaves.

Daleys has a simple but real informative video about growing avocado trees successfully. it'll certainly shed a bit of light to why your trees are having problems. hope it helps! http://youtu.be/W_Vx86SCX4w
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BJ11
KENSINGTON,3031,VIC
16th August 2017 2:23pm
#UserID: 3414
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Anna B says...
Thanks BJ11, I think it is wind burnt despite the shelter.
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Anna B
Ferntree Gully
17th August 2017 4:27pm
#UserID: 16688
Posts: 3
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