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by Nikbul 1497 days ago
It is worse for Earth plants due to long term exposure to solar radiation and direct meteorite impacts. Article states that Iron in the moon soil is Fe2, while on Earth it present as Fe3. Another major difference-is silicates and glass composition on the moon. Those are formed by micro meteorite impacts and very different from earth volcano samples.

So plants in moon soil had to adapt a lot more then expected. Also difference between actual moon soil and Earth's moon soil replacement for labs is clearly visible.