I too have a Y. aloifolia which becomes dark red when the temps change. It seems to be a kind of reaction to the temperature differences. Mine is still potted and the soil is a mix of gravel and stones with as mall amount of clay.
Always nice to see it.
Seasonal color changes in Yucca aloifolia - Steve in N Alabama z7b October 24, 2017, 6:22 pm
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