Garden speedwell Veronica longifolia blu Organic — Hardy plantLong, lovely fronds that fill the garden with colour! Garden speedwell (Veronica longifolia) decorates the garden with lavender blue flowers on long stems. They steal the show! The flowers of the organic garden speedwell are edible and attract and butterflies. Bring extra charm into your garden. Speedwell is a native plant. The flower spikes bloom brilliantly in the summer. Plant three plants per linear metre. Give the hardy Veronica a sunny spot.