Here, I've placed only one plant (1 of 4 in a cell pack). It's now late August and it still flowers endlessly, providing great colour.
I don't dead-head. I water every 3 days or so. I fed the hanging planter twice (once at planting and once in July) with bone meal.
|Flowers are simple, held in clusters.
I have some in full sun out front and in deep shade out back. It's a full light spectrum plant - which is rare when it comes to annuals.
No bugs seem to bother it; it tolerates drying out occasionally, and it continues to flower with no effort on my behalf.
Try it yourself!