Red Grapefruit

These evergreen trees are usually found at around 5-6 meters (16-20 ft) tall, although they can reach 13-15 meters (43-49 ft). The leaves are dark green, long (up to 150 mm, or 6 inches) and thin. It produces 5 cm (2 in) white four-petaled flowers. The fruit is yellow-orange skinned and largely oblate, and ranges in diameter from 10-15 cm. The flesh is segmented and acidic, varying in color depending on the cultivars, which include white, pink and red pulps of varying sweetness.

Oh dear, just read that from Wikipedia, 5-15 meters....and I have this one inside the house.
It's now about one meter.
My youngest son found about 6 or 7 years ago a seed that had already started to grow inside the grapefruit he was eating.
Planted it and the plant has survived and grown...
It gets on well in the greenhouse during the summers and in the kitchen during the winters, but it's growing....
Anybody know when these plants start flowering?

Still feeling flu and tired, but it's Friday... getting better!
Have a good one, you all!