6-8 foot in the ground. In containers it depends on the size on the container.

Four Winds Growers is not offering plants on Flying Dragon, as I verified with them by email probably two months ago. On their website they mention an average height of about 8 feet for their trees planted in the ground. I don't know how they arrived at that figure. I'd expect their varieties like grapefruit, orange, and true lemon to grow to 12 to 15 feet in the ground. That's smaller than full size trees, but bigger than what I'd expect from trees on Flying Dragon.

Here is a link that might be useful: Four Winds Growers

Hair, as Laaz says, your tree size will never become very large any way when grown as a container plant, especially with Four Winds "true dwaf" rootstock. Nice seeing your post. I have not seen you post for a while. Good luck. - Millet

Hey Eddie. I bought a couple of the Sungolds you told me about. Great plants.

I imported four citrus trees from Four Winds into the UK about twenty years ago, when it was still permitted to do so.
They are growing in containers about 18inches diameter and the same deep, and are around 5ft tall. I keep them about this size in order to fit into my winter heated greenhouse, but rarely need any significant pruning.

Yeah, I've been busy and not around much.

The main reason for my question was that my Trovita Orange, which I have had almost 2 full years, has already doubled in size! Not height so much but spread.