Hi Barb,

if your soil is 7.2 your fine. Most of the western Yuccas I know of seem to grow in limestone based soils so they like a pH higher than 7.0.

Tim

Its the combo of warmth and abundant warm season rainfall.

they like a pH higher than 7.0.

so how come they grow so well in your acid soil at your place? 😛

combo of warmth and abundant warm season rainfall

obviously more important than pH.

I can provide the heat...and despite desert dryness, have a tap nearby. 😆

Barb

Hi Barb,

not all Yuccas prefer higher pH. The rupicolae series of Yuccas typically grow in limestone areas (Y. rupicola, Y. pallida, Y. reverchonii, Y. rostrata & Y. thompsoniana). My larger Y. rostratas seem fine with our lower pH soils. The other 3 species don't thrive here.

Y. pallida and rupicola are not that easy in my garden. One of my Pallida's died this summer........another is doing very poorly. I blame their poor performance on low pH but it may be something else. Also, Y. angustissima, Y. harrimaniae and pretty much any Yucca native to northern Arizona, Utah, northern New Mexico and western Colorado can't grow here........not sure why. I need to head to Lowes and pick up more lime or even better should pick up lime stones.

Thanks for those details Tim.