I planted 2 avocado trees 8 years ago & all I get is small bitter fruit. How long B 4 I get some good fruit?

I planted 2 hass avocado trees 8 years ago. They grew like weeds but all I get is a bunch of small, bitter tasting fruit. How long do I have to wait until the trees put out good fruit? I don't need a lot of guesses about how I feeding or careing for my trees, I've been doing by the book. I just need... show more I planted 2 hass avocado trees 8 years ago. They grew like weeds but all I get is a bunch of small, bitter tasting fruit. How long do I have to wait until the trees put out good fruit? I don't need a lot of guesses about how I feeding or careing for my trees, I've been doing by the book. I just need someone with avocado growing experience to tell me when I can expect to get eatable fruit? Thanks.
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