My last venture with nasturtiums was in 2008. I planted early, outside in full sun. There is no record past early May, but the plants were already stressed then. We were in a drought and the sun was hot.
Empress of India, May 2008
St. Clemens nasturtium, Spring 2008
Empress of India Seedlings, March 2008
My containers are already outside where they will get filtered sun.
I'm hopeful they'll last well into hot weather.
I'm growing Nasturtium "Spitfire" for the GROW project.
Thanks to Renee's Garden for the seeds.