There are a number of plants that you can purchase and grow in Hogwarts Legacy, and Fluxweed and Venomous Tentacula are particularly important. You need to grow and harvest these plants if you want to complete your potion classes, and progress through the game. They can be quite difficult to track down, but this guide will outline everything you need to know.
Here is everything you need to know about Fluxweed and Venomous Tentacula in Hogwarts Legacy.
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