Many years ago I visited the south of Russia, the Kuban region near the Sea of Azov, with a small group. Excellent climate. And while touring we could see the deep black topsoil exposed in road cuts. Reminded me of what you see driving through Wisconsin countryside. They’ll do well if they set up there. And if they like Caviar, the Azov Sea has lots of Sturgeon fishing.
The Volga Germans were invited by Catherine the Great to help introduce more modern agricultural methods to the Russians.