Basically 30cm between each plant, they have space to grow outward and will get very tall eventually
Discussion
I can’t believe thats “spacing them out” thats our usual spacing.
Thank you for the response, you are literally doing tge same thing as myself, I however have had to purchase compost as our property is still bare bones 
Compared to other plants that is spacing them out. Beetroots are 10-15cm between rows, Bok Choi 20 cm or less
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)
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.