Steve, that E. purpusorum looks wonderful. I should think with your greenhouse most Echeverias would love your natural conditions. They probably would react negatively to too much direct rainfall, but the overcast conditions and cool temperatures should suit them very well. Mine grow and look their best during the winter months when I can provide enough light. Again this winter mine was hanging outdoors while other plants were inside in winter storage. It's the only way I can keep it from etoliating. It insists on growing during the winter. They haven't loved the excessive heat of summers here. Only 'Lola' has survived for a few years.