And here's another small update!
The sun is shining and my old Frithia pulchra finally opened its flowers. They only open completely around 11 AM and close again by 1 PM. My second F. pulchra is growing flowers too, but it'll be too late for pollination.
I think the camera overreacts when faced with so much lilac. On the photo it looks like most of the flower is colored in lilac and pink while in reality there is much more white inside and lilac is mostly at the tips. I couldn't catch that. It's beautiful nevertheless. Wonderful plant!
Here is a photo of part of my garden for scale ;)