Ponytail Palms

Question

I’m looking to make a beach terrarium and would like to include a Ponytail Palm. Would it be alright to plant the palm in just sand instead of a sand/peat moss mix?

Answer 1

Though a Ponytail Palm needs a well draining sandy soil, sand alone would not hold up or sustain a Ponytail Palm.
The soil mix need some amount of organic or loamy mix with sand.

https://www.gardeningknowhow.com/houseplants/ponytail-palm/ponytail-palms-outside.htm