I guess so lol. We are going heavy into cut flowers, ~65 in a 3x1m beds which will be in the 10-15cm range
While we usually do tomatoes 30-45cm apart.
Ps love live metric (I use a weird mix of imperial/metric as a Canuck)
Discussion
My wife is Canadian 😉 Feel free to keep asking questions and I will try to answer if I can, I am happy to help.
We do our tomatoes at 30-40 cm, but we use the tomatoe hook trellis system so they are tall and heavily pruned.
I'd love to get into flowers eventually as well.