Against this, I referred to Ceramics for Gardens and Landscapes by Hessenberg. This e book is about outdoor pottery and ceramics. And terracotta clay capabilities very seriously within the resources used by the potters talked over from the e-book. Then there is a very long list of serious objects, https://flowerpots6inch12221.ttblogs.com/7754814/helping-the-others-realize-the-advantages-of-large-terra-cotta-pot