I have an idea about using some unglazed jugs in my garden for a slow release irrigation. The idea is that the pot is buried and the soil wicks the moisture that it needs. So far, short of gluing terracotta pots together, the bisque seems to be the cheapest option. If you would like to google the method, it is called an Olla.

What are the chances that the unglazed bisque will hold up to what I want to do with it?

Thanks
Kristiina