Mulch for avocado trees in north FL

General Fruit Growing
1

I have this bark compost which has about 20% compost with a ph of around 5.8. Would 4" of this be good mulch or do I need larger pine bark or something else? I’m in North Florida where is get pretty humid, zone 8b.

20 percent compost and bark from mavis 1
20 percent compost and bark from mavis 11920×1440 356 KB

20 percent compost and bark from mavis 2
20 percent compost and bark from mavis 21920×1440 377 KB

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