Stanley Plum

Overview

Stanley is a classic European plum valued for its dependable productivity, versatile fruit, and adaptability across a wide range of climates. It is best known as a high-quality fresh eating plum, but also well  known as a prune plum (perhaps after Italian). 

Flavor & Uses

We tried Stanley for the first time from one of Doug Hawes-Davis' trees in Missoula. They are reminiscent of an Italian, although a little bit sweeter. Some growers note that they also make excellent wine.

Cold Hardiness

While some sources list Stanley as a Zone 5 plum, our experience suggests it is better suited to Zone 4. It has survived significant early fall frosts at our nursery, including temperatures down to −10°F on October 26, 2020, indicating an ability to handle colder conditions than often reported.

In our experience in western Montana, Stanley is a solid Zone 4 plum. However, if you are in an area that regularly sees temperatures below −30°F (and certainly anything colder than -35F), we recommend planting some of the hardier plums we offer instead. These include Asian × American hybrids such as Toka, Pipestone, Underwood, and Kuban Delight, as well as very hardy European plums like Northern Blue, La Crescent, Ptitsin #5, and Mount Royal, all of which can tolerate −40°F and possibly colder when well sited.

Ideal Growing Conditions

Stanley performs best in protected locations, away from frost pockets and strong winds. Sites with nearby structures or pavement that provide additional warmth and shelter tend to be especially favorable if you are in an area that can see -30F or colder (probably wouldn't make it past -35F). 

Pollination

For best fruit set, plant Stanley with Italian, Northern Blue, La Crescent, Ptitsin #5, or Mount Royal.

Tree Size & Rootstock

These trees are approximately 5–7 ft tall and are grafted onto Lovell full-size rootstock.