I had some last year that were around 16"-20" tall at harvest, and I have seen much larger plants from people on here. They can grow really well, just have to get used to watering it a lot, sometimes 3x a day when we had a heat wave last summer. I had mine grouped together in a box and got a decent amount at harvest.
![20190910_184455.jpg](/data/attachments/3698/3698093-1a6ec81e87225ec8e29445b060f0a5dd.jpg)