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Progressive Ripening Plum

This cluster of Giant Maritima plums has one fruit nearly ripe, one nearly green, and two in intermediate stages. Such uneven ripening is a fault in a shipping fruit, but it may be a merit in a fruit for home consumption, greatly lengthening the fruit season.

Progressive Ripening Plum

This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 5 Chapter 6