Low-growing groundcover, with short spikes of violet-blue flowers in early summer.

Invasive, we keep it contained in our perennial border.

Doesn't have much going for it, this is one likely targeted for the compost bin.

Hardy zone 4.

Flower spikes reach 6" to 8", will spread to form a patch several feet in width if you let it.

Glen's score:  4.

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