No. I haven't tried too hard yet because I don't have too many flower varieties (my native lilies, windflowers, and pansies). I was hoping I would've found more flower varieties by now, but no luck. I also was waiting to have full access to my island (with ladder and such), and I've only had that for a few days.
I think I'll make a garden area today or tomorrow and start working on this. I can at least get hybrids for the 3 flower types I do have if nothing else.
currently working on it! i have groups of flowers scattered around my island and i'm trying for as many combinations as i currently can. i've mainly gotten orange and pink hybrids, but today i got my first black lily.
A few rose hybrids grew on their mountain on their own (Pink, orange, black) and I was lucky enough to get the ladder in time. Other than that no, I have not bred any hybrids myself.