Parentage: Unknown, but most authorities suspect All Blue originated in the US or the UK (Scotland) in the late nineteenth century.

Production Characteristics

• Maturity: Late (unless you want small tubers, plant them first and harvest them last).
• Yield: Medium. Withstands dry conditions better than most. Yields are good no matter what--perhaps why it has been grown for more than 100 years.
• Tuber set: Heavy and deep in the hill. Plant at wider spacing (10-12 inches to avoid small tubers). Nitrogen: 100-125 lb/a (mineral soils); 80 lb/a (muck).
• Specific gravity: Medium; 1.062 to 1.79; lower in southern states, higher in northern.
• Diseases: Susceptible to PVLR, PVY, bacterial ring rot, black leg, Golden Nematode Ro1. Moderately resistant to late blight, hollow heart, second growth, shatter bruise, common scab, powdery scab, PVA, PVM, PVX and PVS.
• Storage: Excellent keeper. Long dormancy.
• Market: Specialty tablestock and fresh markets.
• Advantages: Well-known in 'specialty' niche markets for purple potatoes. Some marketplace recognition due to its white vascular ring. Terra Chips uses All Blue for its purple potato chips.

Physical Characteristics

• Plant
  • Growth habit: Tall, robust plants with semi-erect to spreading habit. Prolific, vigorous vines.
  • Inflorescences: Clusters of blossoms (corollas) are blue with yellow-orange anthers with longitudinal blue-purple stripes
  • Stems (vines): Blue-purple
  • Leaves: Dark green
• Tubers
  • Shape: Oval to oblong to long. Dr. Salaman described them as 'perfect cylindricals'
  • Eyes: Large number of moderately deep eyes, evenly distributed. Eyebrow prominence is slight
  • Skin: Deep purple with netted texture
  • Flesh: Mottled purple streaked with white and its defining characteristic: a white vascular ring