Plant directly in concrete urn?
I am zone 5, northern Indiana and have a concrete urn I want to put shade/part shade plants in for the summer. Basically, I am thinking caladiums, impatiens and something trailing. Do you think I should plant these directly in the urn or use a plastic pot that fits inside? The urn will sit close to the entry and is on the north side of our house, mostly shade. Any suggestions would be appreciated.