The editor of TMG, Caroline Harbouri, has written an article (TMG No. 63, January 2011): 'Some Salvias Grown in Pots… With Comments from Sparoza (Salvia guaranitica, Salvia discolor, Salvia leucantha, Salvia madrensis and others)', there are some photos on the MGS's website with photos illustraing the article, and this is what she writes about this salvia:
'Salvia discolor is a great success at Sparoza. It flowers continuously throughout the year, even under protective horticultural fleece in winter (for it is somewhat tender). It receives less water than the other salvias in the terraces but never wilts. It is happy in positions where it can cascade down over a wall..'
The other salvias seem to be watered every four days at Sparoza.