I forgot you were in one of the tallest buildings in your area. You've probably got the best kept secret in the city!
Nude gardening! LOL! Watch where you get sunburned at. High up there on that rooftop, you are closer to the sun's rays!
I know you have a nice collection of Brugs. I am curious ... what size container do you grow them in. I lost all but one Brug that was in the ground. (I'm gonna have to dig that one up as it isn't doing so well and plant it in a container.) Right now I am using 5 gallon buckets (self-watering containers). I received cuttings from a very kind cubiteer! They are supposed to be different colors, some doubles and maybe a triple. But they are NOIDs, which is fine with me. I am not a collector of named varieties, I am a collector of beauty. The ones I have in the buckets are doing great! Better than anything else I have grown them in, in the past. In looking at some of your photos, it looks like you made some long narrow containers to plant some of yours in? How much root room do they need?
Here is a photo of two of my Brugs in the buckets. Not such a pretty container, but it does the job very nicely for now. I am concerned about the bucket tipping over as the brugs get bigger. I'm trying to come up with a solution for that currently. That is a Firecracker plant in the center. (A hummer favorite.)