4910 - Hayayuki Rice Oryza sativa (105 days from transplant) Open-pollinated. A lowland rice, hayayuki is Japanese for the first snow of the season, which perhaps coincides with its harvest in colder climates. Very nutty and full flavored. Fast to mature, it does best from transplants. Sensitive to dry weather, for large yields Hayayuki craves saturated soil until July. Tops out at about 3'.