From what I've read, Grapefruit come true to seed, Pumelo do not; The Oro Blanco is a Grapefruit/Pumelo hybrid. So my question is...what may I expect from an Oro Blanco seedling?

I have a 4 foot seedling from a seed I snatched out of a fruit from when my parents lived in Palm Springs CA; While not my favorite Grapefruit, Oro Blanco's aren't very common here in Southeast Louisiana. And since I already have a Grapefruit tree and I already have a Pumelo...If if it will grow true, I'll put it in the ground. The leaves on it are smaller than my Chandler Pumelo, more in line with grapefruit size.

Thanks,
David

True grapefruits come true from seed, but I do not believe Oro Blanco comes true from seed. However, in my opinion that makes Oro Blanco all the more interesting. - Millet

All of my Oro Blancos have been seedless or have malformed seeds that will not be viable.

So I still haven't decided. It is quite easy to test once you germinate them from seeds, but seeds I do not have, even from the store bought fruits.

I asked this a while back. I found 2 seeds in one fruit (of many that I bought) and have one seedling. Slow growing, but particularly pretty - looks like a grapefruit to me, but the darkest green of all my citrus. Maybe in 20 years.....

Lucky for you!

Does the seed sprouted more than one embryo?

Only one sprout that I saw. I stuck the seed in potted plant in my bathroom window so I wouldn't forget what it was. Most potted plants in my yard have a citrus seedling in them and I can't remember what they are. (But I usually only eat grapefruits and tangerines!)

Likewise, I only remember one sprout when my Oro seed first germinated.

Only one way to find out I guess...PLANT IT!!! (and wait)

Forgot to mention how I came by the fruit...A friend of my parents (also from Southeast Louisiana) brought it over to my mother's home in Palm Springs to ask me what it was-they had never seen a grapefruit quite like that, and made the comment that it not very acidic. I asked them where they got it, and they told me that there was what appeared to be an abandoned tree growing on the side of a small strip mall with lots of fruit littering the ground. They picked several, and gave me one. Luckily, it had (if i remember correctly) two seeds, one of which sprouted when I returned home.

Having only one sprout (embryo) gives further evidence that Oro Blanco probably does not come true from seed - Millet

My local grocery store has Oro Blanco grapefruits. The fruit was green with a few showing signs of turning yellow. Is this variety better when picked with green skin like some satsumas?

i got me some of those from HEB. they were very good.