USDA Certified Organic Kirke's Blue was named by Joseph Kirke, a nurseryman from London who first propagated it in the 1830s. Kirke's Blue (or Kirke's) is a late-season dessert plum known for its large, dark purple-blue fruit with a blue bloom. The flesh is greenish-yellow, juicy, and firm, with a rich, sweet flavor. It's a popular choice for fresh eating and is also suitable for drying. A relatively small tree great for the home garden. For further information on the Kirke's Blue plum please see below for assistance selecting this bare root plum tree for sale. * limited availability 2026 Considerations for Kirke's Blue Plum USDA Zones: 5, 6, 7, 8, 9, 10 Heirloom: Yes Harvest Period: Late Low Chill: Yes Bloom Period: Late Pollination Requirement: Requires another variety Origin Date: England 1800's Storage: A few weeks Rootstock: Mariana (semi-dwarf) Years to Bear: 2-5 years Recommended Spacing: 12-16 ft.Mature Size: 12-16 ft.Water Requirements: 12-15 gallons per week May through Sept. [TABS] Size of tree Our trees range in height from 4-8 ft. in our field and trimmed to 4 to 5 ft. when shipped. Our young two year trees are most often feathered (side limbs). The trees diameter (caliper) is often 1/2 to 3/4 inch; *As noted by University of California Scientists and other qualified professionals the most successful trees often have caliper from 1/2" to 5/8" and usually establish faster than smaller and larger planting stock. . Pruning tip Basic idea for Pruning: Most fruit trees should be pruned in frost-free periods mid to late winter. (apricots best after bud break) Remove most vertical branches and shorten side branches. Fruiting wood is best on horizontal to 45 degree limbs. Learn more... Shipping information Shipping Note: Our fruit trees and berries are delivered to you bareroot during their winter dormancy from January through May depending on USDA zone. Trees are shipped with your invoice and helpful planting directions. There is no minimum quantity required but shipping rate for an individual tree is expensive since UPS/Fed Ex charge a dimensional weight and an additional handling fee to ship a tree. On that note, we ship orders of one to three trees in a 48-inch box. These trees are professionally pruned prior to shipping so they are ready to plant upon arrival You'll find it's cost effective to consider a handful of trees,vines or our helpful Tree Starter Kits. [/TABS]
