I was eating a grapefruit and 3 of the seeds in it had roots on it, so I planted them in pots and they sprouted nicely. Well they got too big for the pots, so I put them in the ground. Will they bloom and produce a grapefruit?
Rooting a Grapefruit
Certified GKH Gardening Expert
If it was a store bought grapefruit, the fruit you get from the trees will be inferior to what you are use to. Store bought citrus grows on trees that are grafted so that they produce a better fruit. Yours is not, so the fruit will not be as good.
Beyond that, citrus trees can take up to 10 years to produce. It may be many years before you see fruit.
But, they actually make very nice houseplants. Just make sure they have enough water and sun and they are very lovely.