Sustainable intensification of quinoa production in peri-urban environments in western Washington state utilizing transplant vs. direct-seed methods

Summary

This field trial compared transplant and direct-seed establishment methods for quinoa (Chenopodium quinoa) grown on two farms in the Olympic Peninsula, western Washington, across three varieties and three planting dates. Transplanted quinoa achieved higher survival rates, faster progression through developmental stages, and greater seed yields than direct-seeded quinoa, though transplants were shorter, more branched, and experienced higher lodging in early plantings. The findings suggest transplant methods could improve quinoa production efficiency in peri-urban and urban farming contexts in the Pacific Northwest.

UK applicability

Quinoa remains a minor alternative crop in the United Kingdom, but findings on transplant versus direct-seeding establishment may inform diversification strategies for horticultural producers in similar temperate climates. Lodging management and variety selection would require UK-specific validation given differences in growing season length and moisture regimes.

Key measures

Survival rates, developmental stage timing, plant height and branching morphology, lodging rates, seed yield

Outcomes reported

The study compared transplanting and direct-seeding methods for quinoa across three varieties and multiple planting dates, measuring survival rates, plant morphology, developmental stage progression, lodging incidence, and seed yields. Transplanted quinoa demonstrated superior survival, faster development, and higher yields than direct-seeded quinoa, though with increased lodging risk in earlier planting dates.

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