What planting mix/soil for spin out bags?
Like many here I have a root problem due to fir and maple trees. I have ordered spin out bags to save a good portion of hostas that have been struggling over the past years. I have had great success with pots, thanks to this forum's wisdom, but what mix do I fill these bags with? Should I treat them as a potted hosta or in ground plants? I have done a search and the answer to that question doesn't come up or I missed it. Thanks in advance.
P.S. I have been a lurker for years.