This is a small cultivar but, despite its diminutive size, it puts on a good show – with many blooms per flower stem. As the plant is so small, it should be kept in a fairly small pot – this makes it vulnerable to under-watering so wicking or capillary matting is recommended in less humid or very warm regions.
Rob's twinkle blue is generally regarded as a tender plant, so remember to wait until your soil is warm and the night time temperature is well above freezing before moving outside.