Onion ‘Stuttgarter Yellow’ is a classic, versatile yellow onion that performs exceptionally well in greenhouse production. It develops medium‑to‑large, flattened bulbs with golden‑brown skin and crisp white flesh, delivering robust, traditional onion flavor and broad culinary appeal. Known for its reliable yields, excellent storage qualities, and ease of cultivation, this open‑pollinated variety thrives in controlled environments with full sun and well‑drained soil, making it a dependable choice for greenhouse growers seeking consistent performance and marketable harvests.