Of course, a few plants have passed their peak already, including Geum 'Mango Lassi' and Pulmonaria 'Samuari' which were in full bloom in late May.
More recently, Coreopsis 'Jethro Tull' has been oustanding. It is a new hybrid (C. auriculata 'Zamphir' × C. grandiflora 'Early Sunrise') that forms a nice mound that is simply covered with extra large blooms.
Also, the mysterious Veronicastrum 'Red Arrows' is approaching full bloom. I finally realized the cultivar name is for the reddish buds and leaves and not the flower colour. I hate when they do that. :(
Finally, some plants are obviously signficantly different, i.e. more impressive, in their second year. Heuchera 'Chinook' is one, that was a little too dainty and sparse in flowering last year, but looks much better now.
