Plant ID forum: Giant Lemon/Grapefruit?

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San Jose, CA
Jul 17, 2016 10:16 PM CST
We moved into a house in Northern California about 4 months ago and found a tree with some type of citrus. We at first thought it was grapefruit until they grew much larger. We picked a yellow one, but the pith was about double the thickness of the actual fruit and it was extremely sour. We thought it might have grown weird since no one had been watering it for awhile. I've been watering and fertilizing it for about 2 months and there is much more fruit and one grew much larger than the previous fruits.

This one is a tiny bit over 9 inches wide. The pith is still large, but not overwhelming. The taste is very sour - almost as sour as a lemon, but just a little less sour. We were hoping pomelo, but there is no sweetness at all.

I then thought ponderosa lemon, but are they always this large? They do not get yellow until they are about 7 inches in diameter. The ones still on the tree in the below pictures are actually about 4-5 inches across and still very green. There is also not a protruding tip at the end like I've seen on others - the ends/bottoms are perfectly round.

I have also heard it might be a Cuban Shaddock and have read the fruit is inedible? No idea...

Help! Thank you!
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[Last edited by gkgrace - Jul 17, 2016 11:22 PM (+)]
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Name: KadieD
Oceania, Mariana Islands (Zone 11b)
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Jul 17, 2016 10:51 PM CST
Are you familiar with this type citrus?
Name: Porkpal
Richmond, TX
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Jul 18, 2016 6:52 AM CST
I think it is a Pomelo.
Name: tarev
San Joaquin County, CA (Zone 9b)
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Jul 18, 2016 9:38 AM CST
It looks like suha, that is what we call it in the english as Porkpal said pomelo.
Name: Lin
Southeast Florida (Zone 10a)

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Jul 18, 2016 9:43 AM CST
Reminds me of the big, bumpy Ponderosa: Ponderosa Lemon (Citrus x limon 'Ponderosa')

More info from Univ. California: http://www.citrusvariety.ucr.e...
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Name: Der Thomaskantor
Massachusetts (Zone 6b)
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Jul 18, 2016 10:03 AM CST
plantladylin said:Reminds me of the big, bumpy Ponderosa: Ponderosa Lemon (Citrus x limon 'Ponderosa')

More info from Univ. California: http://www.citrusvariety.ucr.e...

I was just about to say that! Hilarious! Most of the pomelos I've seen and eaten have smoother skin and are typically not that sour, so it's most likely a Ponderosa lemon.
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