Jo-Jo
ActivePrunus domestica L. · European plum
Walter Hartmann c/o Universität Hohenheim
Prunus domestica L. European plum · Fruit crops · bred by Francesco Valli
also searched as: блуе мун
10 August 2026
The tree is characterized by medium growth vigor and a spreading crown shape. The variety is not self-fertile and requires cross-pollination. It enters bearing at an average time, and productivity is stable.
Fruits ripen in the first ten days of August. They have a weight of 75–80 g, a round or obovate shape, and a blue-violet skin with a moderately expressed suture. The flesh is yellow-green, juicy and firm; the stone is freestone. The sugar content is about 18.5° Brix.
The variety is less susceptible to bacteriosis compared to diploid plum species. Fertigation is recommended to obtain high-quality produce.
1 jurisdiction
Green indicates countries where the variety is listed in the national catalogue and its seeds are authorized for sale. Expired registrations are marked separately: the variety was previously admitted, but sale is no longer permitted.
Variety registered as early as 1 jurisdiction, data for which we do not publish: their registry licenses have not yet been verified. This section will be available upon verification.
The right is granted for a limited term: propagation of the variety requires a license from the rights holder.
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Same species
Prunus domestica L. · European plum
Walter Hartmann c/o Universität Hohenheim
Prunus domestica L. · European plum
Hartmann Walter
Prunus domestica L. · European plum
Walter Hartmann
Prunus domestica L. · European plum
Prunus domestica L. · European plum
Prunus domestica L. · European plum
Nearby in the species list Bistrica, Blå Abrikosblomme, Blå Herreblomme, Black Prince, Blaue Krieche, Blaue Zipper, BLEU FREE, Bleue de Belgique, BLUE FREE, Blue Frost, BLUE MOON SEL. 8-91, BLUEBELL (BLUE BELLE PLUME), Bluefre, Bluefre ISK, BM-VA-1, BM-VA-2, BN 4 Kr, Böhmische Ananaszchwetschke, Bonne de Bry, Bornholmsk Kæmpeblomme