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Ishikura Improved Onion
Ishikura Improved Onion
Sale price: $2.45


  • Allium cepa. Open pollinated. 50 days. 
  • Ishikura Improved Onion  is one of the most popular onions in Japan, the single stalks will grow up to 2.5 ft. long. We've seen amazing specimens in Asian grocery stores.
  • Usually grown as a high quality scallion.
  • Plant in a trench and mound soil up.   Non-bulbing.
  •  Sow March to June, harvest May to October.
Planting Directions:  Direct sow in spring as early as the ground can be worked and soil temperature  is between 50˚ and 95˚. Plant seed ½” deep. Sow indoors 8 weeks before last frost in spring. Keep soil temperature 50˚ to 95° and consistently moist for optimum germination. Plant in loose, well drained soil that has been enriched with compost or a general purpose garden fertilizer. Plant seed in a trench and as the onions grow fill in the trench with soil as this is a very tall bunching type onion. When the plants are 2” high, thin 2” to 3” apart. The greens you thin can be used in cooking or salads. Water moderately on a regular schedule. Plant in late summer for an early crop the next spring or summer.