A highly flavored, late-season dessert apple, perfect for organic production.
Ruby Queen Plum on BY520-9 (Nematode Resistant) (Spring 2026)
A delicious mid-late season Japanese plum. Also known as BY8155.70.
This is a productive, upright, mid-sized tree with moderate resistance to bacterial leaf spot and bacterial canker. It is considered an especially desirable variety for organic production and humid climates. Ruby Queen is not self-fertile and will need another Japanese plum as a pollinizer. Possible partners include Methley, Shiro, Vanier, and Santa Rosa.
Ripening mid-season, Ruby Queen produces large reddish-black plums in abundance. The fruit is clingstone, firm enough for commercial production, and has an excellent sweet flavor.
Ruby Queen was developed in the USDA/ARS breeding program at Byron, Georgia by Jim M. Thompson and W. R. Okie. This is the same program that produced Rubysweet and Byrongold.
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The Fruit
Fruit Type
Category: Plum
Subcategory:
Japanese
Fruit Uses & Storage
Uses: fresh eating, jam, baking, freezing, sauce
Storage duration: less than one month (approximate, depending on storage conditions)
Fruit Appearance
Skin color: red
Flesh color: red
Fruit Origins
Parentage: open pollinated BY7607-10 (Frontier x Redroy)
Origin: Byron, Georgia
Introduced in: 2004
Introduced by: Jim M. Thompson and W. R. Okie
The Environment
Calendar & Geography
USDA zones: 5 - 8
Chill hours: Not yet determined
Ripening date: Sep 08 (approximate, in New York State) + 7 days after Stanley
Tree Height & Spacing
glossary
Rootstock: BY520-9 (Nematode resistant) Rootstock
Rootstock size class: Standard (100% Size)
Tree spacing: See details
Good for wildlife planting? N
Diseases & Pests
glossary
Bacterial Spot: Resistant
Bacterial Canker of Stone Fruit: Resistant
Pollination
Pollination Factors
glossary
Bloom group:
Is it self-fertile? N
Is it fertile? Y
Rootstock size class:
Standard (100% Size)
Pollination Partners
This table shows the first few results from a full search for pollenizers of Ruby Queen Plum on BY520-9 (Nematode Resistant). Please see our Pollenizer Search to run other queries and read how the application uses various factors. Also read more about fruit tree pollination.
See all pollination matches for Ruby Queen Plum on BY520-9 (Nematode Resistant)
SF 14.09, 14.20
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