How do you grow a big dark oak tree in Minecraft?

How do you grow a big dark oak tree in Minecraft? Growing these trees requires four dark oak saplings arranged in a 2×2 grid; they do not grow if planted individually. Dark oak trees grow at a much faster rate than most other trees. They require a 3×3 column of unobstructed space at least 7 blocks above the sapling to grow (8 blocks including the sapling itself).

Growing these trees requires four dark oak saplings arranged in a 2×2 grid; they do not grow if planted individually. Dark oak trees grow at a much faster rate than most other trees. They require a 3×3 column of unobstructed space at least 7 blocks above the sapling to grow (8 blocks including the sapling itself).