History: Shiro plums (translated from Japanese as 'white') were developed in California and introduced in 1899. They were bred by horticulturalist Luther Burbank who is renowned for his extensive experimentation with creating new plum varieties. Shiro plums are most commonly grown in the United States and Canada.
Why We Grow It: This early Japanese clingstone variety has yellow skin and flesh that is juicy and sweet. The fruit keeps longer than most plums, lasting two to four weeks, and the tree is known for its compact growth and heavy crops.
Canadian Hardiness Zone: 5
Soil Preference: Sandy loam and loam, like plenty or organic material. Prefers average to moist conditions with well-drained soils, avoid planting anywhere that floods for more than two weeks in the spring.
Growth Habits and Disease Resistance: Compact growth habit and produces heavy crops. Slightly susceptible to black knot.
Sun/Shade: Full sun (approx. 8-10 hours of sun daily)
Pollination:Requires a pollinator of a different Japanese plum varietythat blooms around the same time
Flowering Time: Early
Bloom Colour: White
Ripens: Early August
Storage: Keeps about two to four weeks in the fridge.
Recommended Use: Fresh eating
Size including roots:
1m+ Whip grade: 100cm+
Branched grade: 100 cm+ with 3 or more branches, 30 cm or more