Hmmm, didn't know that about the Marthas! Interesting.
Mine have been doing better despite our hot weather, even the clearance ones that were pretty ragged looking when I bought them....but they are on the east side of my house so they do get shaded from the afternoon sun.
I've been feeding them about 1 x a week with the fertilizer mentioned above.
I'm going to winter some of them over in the house in soil.
I think I read where you can take the roots out of the soil and let the go dormant
and save them that way too.
