What varieties of red stemmed rhubarb grow best in southern Harford County and when is best time to plant. I tried a few years ago with a large tuber of variety Crimson Red planted in early spring in a sunny area. It did well until the real hot weather hit in August and then it died back and never came up again.
Harford County Maryland
Here is our rhubarb info: https://extension.umd.edu/learn/featured-plants-rhubarb
We recommend Cherry Red, Valentine, and Victoria. https://extension.umd.edu/sites/extension.umd.edu/files/_docs/programs/hgic/HGIC_Pubs/Edibles/HG70_R...
Be sure to water well for at least 2 years after planting so that roots can get established. After that it is more drought tolerant.