Violas are good too (known to some as johny jump ups) and since sewing a couple of seeds a few years ago the balcony garden has never been without violas, though they're not always in positions I choose! Usually transplant them to a little pot like this:
I even found this lovely yellow variety to add to the collection.
They are idiot proof flowers, what more could I need? Well I guess they aren't that idiot proof because I've killed the two pictured violas in the last few weeks. Neglect ... maybe ... poor positioning ... definitely. I left them in the only really hot winter sunny spot in the garden, in smaller pots than most of my garden, and they didn't like that, or the fact I failed to water them. Ooooopsss.
At least there are about 20 other violas springing up in the garden to replace these guys.