Summary
This field trial conducted on two farms in the Olympic Peninsula of western Washington state compared transplant and direct-seed establishment methods for quinoa production across three varieties and multiple planting dates. Transplanted quinoa significantly outperformed direct-seeded quinoa in survival, developmental speed, and final yield, though plants were more branched and experienced higher lodging; later planting dates reduced lodging whilst maintaining yield advantages. The findings suggest transplant methodology offers a practical intensification strategy for urban and peri-urban quinoa growers in the Pacific Northwest.
UK applicability
UK growers considering quinoa as an alternative crop in temperate regions may benefit from these transplant methodology findings, particularly in shorter-season environments. However, UK climate conditions, day-length patterns, and soil characteristics differ substantially from western Washington, so on-farm validation would be necessary before adoption.
Key measures
Plant survival rates, time to developmental stages, plant height and branching, lodging incidence, 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 timing, lodging rates, and seed yields. Transplanted quinoa demonstrated higher survival rates, faster maturation, and greater yields than direct-seeded quinoa, though with increased lodging risk.
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