That's really hard to say.
I love the bluebonnets when they bloom, but they're bloomed out now. They don't last long, they're just be-u-ti-ful as they're blooming.
Then that double-impatiens is something else entirely. I've always loved roses, but never have had success with them. I'm having a little more with the double-impatiens, which *looks* like a miniature rose, but doesn't have all the thorns.
And I love the begonia (tuberous begonia I think is what it's called) which is another rose-looking plant minus thorns.
And the geraniums were pretty until they started wilting. I think it gets too hot for them on the porch, but there's nowhere else to keep them in an apartment
They're poisonous to cats and have enough perfume I can't keep them indoors, so I'll just do my best with them on the back porch.
I think it's easier to pick a least favorite than a favorite
Least favorite is easily the hydrangia. Which is almost completely dead now
I think if I had to pick a favorite, I wouldn't be able to, but I would narrow it down very slightly to between the double-impatiens and the bluebonnets.