Guys. I... got my first purple tulip!
Niraj lent me his
JUST YESTERDAY and I haven't borrowed one from Eudaemonic's yet, but turns out they can breed with blacks just fine!!!! I cannot believe my hunch actually WORKED.
I'm SO excited! Especially totally fussing about for forgetting to water most of my flowers yesterday lol. I meant to get up before 6 am to water them but I only had 5 mins to spare lol. So I only watered the important ones. My gold waters 5 if I face the purple tuilp, so the 4 blacks around it were watered definitely.
So in this screenshot, the parent of the brand new purple on the right is the other purple and the lower right black next to the purple.