*Scadoxus multiflorus katherinae* does really well outside for me in the summer. It takes a fair amount of direct sun but the plants get larger and look better in partial to full shade with moderate moisture. They get quite large and lush forming full clumps and bloom very well. Of course, the main difference I have to add is that they remain outdoors all year at this point, not just in the summer and have been quite winter hardy in Zone 8 for over 10 years. Alani Davis Tallahassee, Fl, US