Devon,
United Kingdom 
Hesperis Matronalis - Fabulous blooms last year and now
there is a lot of new growth. I don't know whether to dig them up or leave them in case they have seeded. What do you think?
5 Mar, 2013
Answers
leave them as they will have seeded and last yrs plants will keep going, though they are short lived.
6 Mar, 2013
That's good news. Thanks Spritz and SBG.
6 Mar, 2013
Leave them! You'll get plenty of flowers. :-)
6 Mar, 2013