The <p>The achievement is actually about using the bushes, not eating the blueberries. You can see theres two stages, use and collect, you have do use 500 bushes, and after that collect or eat.
Good luck.eat.<br>Good luck.</p><p><img alt="" src="https://www.tibiaqa.com/?qa=blob&qa_blobid=14101648901570998954" style="height:439px; width:600px"></p>