Keyhole Garden - how tight can I plant?

Hey everyone

Last year I build a keyhole garden in Portugal and this year I finaly have the chance, to test it.
Since I have a lot of tomatoe plants, I wonder, how close can I plant them in the keyhole garden?

I once heard in a video of a texas keyhole garden expert, that you can have the plants way closer than in a normal garden.

Anyone has experience with tomatoes in the keyhole garden?

I have all kinda sorts but would love to try out a big variety - and of course other veggies, too!

The garden is more or less 2,6m in the diameter and made with stones.
Today I added some more soil than you can see on the pictuer below.
Its full of life since over the winter the amount of earthworms and other little animales exploded.

Thanks alot in advance for you answers!
Markus

Ps: that was my previews post about the keyhole garden:
https://permies.com/t/146674/Keyhole-garden-materials

Howdy Markus, Depending on what type of tomato that you are planting, I always consider that they will grow upwards more than horizontally. I plant them about two feet apart and build a cage around them for verticle support.

Miles Flansburg wrote:Howdy Markus, Depending on what type of tomato that you are planting, I always consider that they will grow upwards more than horizontally. I plant them about two feet apart and build a cage around them for verticle support.

Hey Miles,
https://youtu.be/hobrYWufEN0
At minute 04:30 Dr Deb Tolman is taking about 70 tomatoes.
That sounds quite not possible...

I have all kinda tomatoes.
From 1 m till 3 m.
I thought, best would be to put in medium size, otherwise it would be hard to maintain... our i have to prune the plants.

Markus Tanz wrote:[I have all kinda tomatoes.
From 1 m till 3 m.
I thought, best would be to put in medium size, otherwise it would be hard to maintain... our i have to prune the plants.

Are your tomato plant bush tomatoes or vine tomatoes? Determinate (bush) or indeterminate (vine) tomato plants.

If your plants are bush tomatoes I would only plant two in the garden in the picture.

If they are vine tomatoes then there would need to be room for a trellis or tomato cage.