Planting in the rain

Managed to get about 1/3 of the flat of impatiens in the ground before the rain resumed. (The rain's been on a rheostat all day - swells to bucketing, backs off to nothing, swells to bucketing, backs off...) Since I was on a roll, I just got an umbrella and kept planting. 19 assorted impatiens are now freshly planted and already looking lovely. TW picked some beauts - a wonderful assortment of colors, and all with very healthy-looking foliage. I also planted one stub of white impatiens, a bit that had broken off when TW was doing some yardwork last fall. He stuck it into some water in a bud vase and it's been hanging in there all winter long (even bloomed, twice, after he put it in the vase). That's it in the close-up; it's the one with no flowers, at least right now. We'll see how it does now that it's outside.

My only concern is that the neighborhood cats have been using that bed as a litter box and in the rain, it smells like a used litter box, when it ought to smell of dirt and flowers. Anyone got any ideas for keeping the cats away? TW likes mothballs (which haven't worked), I've tried liberal sprinklings of cayenne pepper.