Wahlenbergia Sky Mist has sky blue flowers on a compact, soft-wooded perennial. It flowers throughout the warmer months of the year. An outstanding plant for a cottage garden style as it forms small clumps that lightly sucker from the roots to ensure the plant’s survival if things get dry. It will tend to spread slowly in the garden by those suckers, so if you wish to limit its influence in the garden then only grow it in a pot. The only maintenance required is to chop off dead flower stems if and when they become unsightly.