Perennial from the Plantaginaceae family, this cultivar of Chaenorrhinum origanifolium stands out from 'Pyrenees' by a significantly more developed and airy habit, reaching 15 to 25 centimeters in height. The stems are thin, branched, slightly pubescent, and willingly take on reddish-brown hues, especially at the internodes and calyces, which is clearly visible in the photographs and constitutes one of the distinctive features of this cultivar in cultivation.
The leaves are small, oval, medium green, arranged along upright to slightly spreading stems that give the plant a more bushy than cushion-like silhouette. The entire plant has a more airy and less compact appearance than 'Pyrenees'.
The bilabiate flowers, of a miniature linaria type, are a soft blue-lilac to pale violet, with a slightly speckled creamy white palate. Their bluish hue, cooler and more washed out than that of 'Pyrenees', fully justifies the name of the cultivar. They are produced in large quantities on elongated stems that rise well above the foliage.
In its natural habitat, the species blooms from June to August. In cultivation, 'Blue Dream' blooms from May to September, with particular generosity at the beginning of summer.
It prefers a well-drained, mineral substrate, in full sun, and tolerates summer drought. It finds its place in rock gardens, at the top of walls or along the edges of slabs, where its slightly trailing stems can express themselves freely.