Cinta, it has been 20 years since I planted any gladfs and do not know the term tender. I thought I wanted some in a garden I once had but remembered how they flop and cant deal with any rain without dropping over so they didnt appeal to me. The Dwarfs seemed to be the answer but I was disappointed when they were 24 inches high or taller.
I do love Frizzos .I bought them from Brent and Becky in 2011 but have stopped ordering any bulbs from them.Their new website is just too confusing to deal with.
This is Frizzo
Kosmic