The terrible cold in December did not harm these young ranunculus plants. They have been tucked under a frost blanket for weeks and should start blooming in March or April along with the daffodils and tulips. They are one of my favorite flowers, and as part of my ongoing garden improvement efforts, I have planted hundreds in shades of yellow, pink, white, and blush.
While sprouting and planting ranunculus starts in November, they are always worth the wait. Exhibit #1 is this small arrangement from May 2022 featuring white, blush pink, and rose ranunculus (with a few white Japanese iris lending their support).

