70-90 day maturity. Vigna unguiculata subsp sesquipedalis. You Fong Wong Yard Long Bean Seeds. Non-GMO, Warm-season annual heirloom. You Fong Wong is an extra long yard-long bean. It produces shiny green 24-36 inch pods that are thick-skinned, tolerant to storage, tender, and delicious. The plant is tolerant of heat and most diseases. You Fong Wong is one of our high-yielders. It is day-length sensitive, and long day periods delay flowering. Try interplanting You Fong Wong with short-season greens and vining plants for efficient use of garden space! Approx. 180 seeds / oz.