Viewing post #1490687 by Brinybay

Baja_Costero said:Yes, that is an instruction for installing plants in the ground. Mixing potting soil with native soil helps the newly installed plant find its way from potting soil (where it grew up) to native soil (where it will end up). Rather than forcing the plant to make a hard transition, the mix you use to refill the hole gives it a sort of bridge to its endpoint.

Best explanation. Now I understand. FWIW, I'm doing mostly container gardening because the soil on our property is poor. Some spots I have revitalized with amendments, but containers are easier for me because the plants thrive in them. Well, mostly.