This is an interesting family of plants with a number of form variations, and needs to be explored more. Many of them have the characteristic flower spikes (or candles) that are ideal for breaking the horizontal profile of a flower beds, and many of their flowers are close to ‘blue’. Some of the ground cover forms can be a little pushy, but manageable.
Veronica spicata ‘Giles Van Hees’
This is a compact pink candle form.
Veronica ‘Blue Indigo’
Another bluish candle form.
This is a nice compact ground cover with golden variegation on dark green leaves and bluish purple flowers.
Veronica bombycina ssp. bolkardaghensis
This is a beautiful silver foliage compact ground cover used in rockery garden.
Veronica gentianoides ‘Barbara Sherwood’
This is ground hugging dark green foliage with tall spike of pale bluish white flowers.
This is a bushy candle form with pale purplish flowers.
This is my favourite silvery foliage Veronica with spikes of bluish purple flowers.
Veronica longifolia ‘Eveline’
Another pink candle form.
Veronica peduncularis ‘Georgia Blue’
This is a very vigorous ground cover with lilac blue flowers.
Veronica spicata ‘Baby Blue’
Another bluish purple candle form.
Veronica spicata ‘Red Fox’
Another reddish pink candle form.
Veronica spicata ‘Rotfuchs’
Veronica spicata ‘Sunny Border Blue’
Veronica Spicata, ‘Royal Candles’
This may be the best dark purple candle form.
This is an aggressive thin ground cover with pretty blue flowers.