I got one foxglove plant at a swap last year. It was a huge beautiful magenta bloomer. This year it's putting up a white bloom. What?! If I got two plants in the pot I sure couldn't tell it was two--looked like one. Is it possible for foxglove to change color like that depending on soil conditions? I know it's a biennial, but some biennials blooms the second year and continue on for some years after that, so I don't have any reason to believe it's not the same plant..except for that color change! It is the only tall foxglove in the garden so I know I'm not mixing it up with another plant. I have dwarf yellows, but this is the only tall one. I do have some that I WS last year and are putting up blooms for the first time this year, but they are in a completely different part of the garden (because the seed was labeled Green Wizard Rud--another garden surprise!) and this one would not be a part of that group. I wouldn't have planted any of those with the tall one because I didn't know until this year they were foxgloves.

Can foxgloves change colors, or do I have a hidden stow-away foxglove from the swap?