Conifers

[Daniel Weston]

Are there any tree fundis on the forum? I have six conifers planted about 1m apart from each other and some of them are dying from the bottom up. The leaves have been steadily turning brown for about 6 months now and it looks as though it's spreading to tree no 3
I have looked for aphids and can't seem to see any so does anyone have any idea what it could be?
Cheers

 

[Spuds]

 

[Daniel Weston]

 

[Spuds]

 

[Daniel Weston]

 

[AVSA Andrew]

 

[philipc]

 

[creyneke]

 

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[Daniel Weston]

 

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[Daniel Weston]

 

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[Daniel Weston]

 

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[philipc]