Question
What soil is best for yucca plants and why don't they flower??  Do I need a "Yucca moth"?????????

Answer
Hi Paul ,Your  Yucca will flower when its ready, and albeit it likes a sandier soil, any soil will suffice; the Moth is only instrumental after the inflorescence develops, at which time it pollinates the flower so it can produce seeds for future generations of Yucca. Nick