We live in southern Ohio, in the USA.
We easily grow both Padron and Shishito peppers in the ground and in straw bales.
Seeds were obtained from Johnny's Seeds at
johnnysseeds.com
Be careful, as some are separated as known to be hot and some mild. As the phrase goes, Padron, some are hot, some are not.
Another source for all things peppers, is the New Mexico Chili Pepper Institute at New Mexico State University in Las Cruces, New Mexico, USA.
cpi.nmsu.edu
The Shishito peppers are longer, maybe 7-10 cm , 2-4 inches, and generally mild, and cook, sauteed, and blistered much like the Galician Padrons.
You can also grow these peppers in containers, as well as cloth garden bags.
IF, you can keep the deer from eating them.
Pleasant growing.