Answer: Browing foliage could be a symptom of transplant shock, or it could indicate that the soil is not draining well. I hope you planted them at the same soil level as they were growing in the pot and that you amending the soil with organic matter prior to planting. If not, wait until they are dormant (after frost kills the tops back) and then dig them up, amend the soil with organic matter and replant them. Cover over the top of the soil with mulch to protect the roots from winter cold. Next spring they should grow and thrive in the sunny spot in your garden.
Best wishes with your peonies!
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