Longan plant from root suckers

[plumania]

Longan is a fruit like Litchi/Lychee, with relatively smooth and tan/brown skin. Fruit is sweet and somewhat like Litchi. Both grow well in South Florida.

Someone gave me a Longan plant from a root sucker. I know fruit quality will not be as good as original if original tree is grafted. Guy could not remember if his was a grafted tree or regular.

Does anyone know if the plant will take as long as seed grown or shorter to start producing fruit?