Ume Plum flowers but doesn't fruit

yukkuri_kame(Sunset 19 / USDA 9)March 9, 2013

The tree is about 5 years old, in the ground at that location for 3 years. It flowers, but doesn't fruit. Not my tree, I'm asking on behalf of an acquaintance.

I think it's like sunset zone 20 or something like that. Glendale, ca.

Not enough chill hours? Needs cross pollinator?

Just hasn't reached maturity? Not 100% sure it is grafted.

Any ideas?

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fabaceae_native

If I'm not mistaken, insufficient chill hours would be problematic in other ways beyond fruiting. You probably hit the nail on the head about pollination though. Pretty sure Ume needs cross-pollination, although other plums and/or apricots might work too. Finally, the majority of Ume are ornamental, and not for fruit production anyway...

    Bookmark   March 9, 2013 at 10:59AM
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maryhawkins99

I had thought ume plums, being basically an apricot, were self fertile. Edible landscape only sells 1 variety, implying its self fertile. Raintree says they're partially self fertile. But I can't find much information online about ume's so I'm not sure.

I'm getting my first ume's this year on a tree in its 4'th leaf. Another 4 year old, and a 5 year old, are not fruiting. I had always blamed the late January blooming followed by hard freeze's in feb. each tree has blossomed in their second year. Perhaps they take 4-5 years?

I guess to answer your question---I don't know.

    Bookmark   March 9, 2013 at 7:23PM
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yukkuri_kame(Sunset 19 / USDA 9)

Thanks for the answers. I looked up the chill hours, and they should be sufficient. I may go ahead and graft some cross-polinators onto my friend's tree next winter.

My wife does macrobiotics, and ferments her own umeboshi. We are still living off ume she pickled more than a decade ago, but supply is low. So we are eager to get some ume scion.

If any of y'all have scion to spare next winter... I'll probably get some from my friend, but I don't have the greatest confidence in the origins of the tree...

    Bookmark   March 10, 2013 at 1:57AM
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maryhawkins99

Sure.

    Bookmark   March 10, 2013 at 7:11AM
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maryhawkins99

fwiw, there was a poster 3-4 years ago; "Yama" in GA; who said all his umes came from the single white flower ume's. He said to stay away from the double pink flowers.

My ume's are on the single white flower tree.

    Bookmark   March 11, 2013 at 8:28AM
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maryhawkins99

fwiw, there was a poster 3-4 years ago; "Yama" in GA; who said all his umes came from the single white flower ume's. He said to stay away from the double pink flowers.

My ume's are on the single white flower tree.

    Bookmark   March 11, 2013 at 8:30AM
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yukkuri_kame(Sunset 19 / USDA 9)

Will an apricot work to cross-fertilize? Or does it need another ume?

    Bookmark   March 11, 2013 at 10:38PM
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maryhawkins99

I don't know. But any of my apricots don't bloom until March, well after the ume's are done blooming (late Jan to mid Feb). So I'll send you wood from 2 ume types.

    Bookmark   March 12, 2013 at 9:08AM
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yukkuri_kame(Sunset 19 / USDA 9)

yay! :-D

I'll be in touch early next winter.

    Bookmark   March 12, 2013 at 12:35PM
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