I think the lure of many pests and diseases are what put people off. I quite like them and this year, i've seen some gorgeous upright compact dark leaved nasturtiums in a window box. They were only about 8" high and were covered in scarlet flowers....i'm going to try some of those next year.
DG, they are gorgeous! I usually avoid nasturtiums cos of pests but I have planted some dark leaved scarlet ones to compliment (I hope) some Thunbergia Salmon shades I am trying for the first time. Both plants are in bud so I havent found out if the combination works yet.
Mine are up and I hope to get them up the tripods to replace the Peas. Maybe it is the lice that love Nasturtiums but one can't possibly blame the plant for that can one? I like them and they are eddible too, nice peppery taste. And also a good bit of colour in the salad.
Weeds are nature's revolution against the government of the gardener.