Extend your bloom through the fall:
Veronica ‘Purpleicious’ (Speedwell) zones 4-8
Purple flower spikes 16’ to 20” inches tall perform into the fall if deadheaded.
Veronica ‘Purpleicious’ first blooms in June. Deadhead after the first wave of flowers fade, add a little low-nitrogen fertilizer to encourage more blooms, and sure enough, another wave will emerge in late August and early September. A little extra work for a lot of extra color!
(We use an organic, low nitrogen fertilizer called "Bloom" that we carry at Victoria Gardens. We find it works wonders on perennials, fruit, tomatoes, roses, and annuals.)
Veronica is not deer resistant. For similar form, color, and reblooming properties use the deer resistant perennial Salvia.