Want to size it up

With proper feeding, enough light and enough time in vegetation, you can get pretty huge plants.

Grounddrill 1 meter deep mix the soil that came out with a little perlite, put it back, form a little depression so rainwater runs into it, and take your pre-grown plant out of it pot, dip it in mycorrhizal fungi and plant, in veg top dress with chicken manure and bottom slurry of ponds. It can become huge, but i will stick to my previous given answer🙃 ive seen people take kilos from a photoperiod here in holland where they let plant grow 60 cm, and then let it grow horizontally for months. Resulting in a plant that doesnt exceed 1.50 meter in height, but are 4 meter wide and can have as much as 64 colas👌

To have a taller plant there are various tricks you can use: do not cut the cola, remove the useless branches at the bottom, put a support net around and possibly also a stick in the center, make sure that it has as much land as possible. (and that it is of high quality). having more plants you could plant them close together, in this way they would not grow in width, but obviously it depends a lot on genetics. being indica, do not expect it to exceed 3 meters (with at least 2 months of vegetative stage)

I would try everything you have to NOT let them become big, force them horizontally! Ive been there done that. Plants of 4 meters but apart from the amazing appearance it only gives trouble, try to push that apex cola 90° angled horizontally. Imagine pushing that 4meter horizontally and getting a monsterplant that is also manageble

The website says it can get over 2 meters. It's 60% indica so I it will grow more bush then tall. But you might get lucky and get a sativa phenotype that grows tall. Tallest plants I have see we're pure sativa and was 4.5 meters. It was started indoors 2 months early and then planted outside.