Wild rice can only be grown in one year. It depends on the seed for its survival. It grows only in shallow water (up to 4 feet deep) in slow streams and rivers and along the shores of certain lakes 👍 In natural stands, and in stands well established after planting, enough seeds usually drop into the water each fall to give a good crop the next year 😎 In good stands, the plants often grow so closely together that they keep out other water plants and form such dense masses that it is difficult for persons engaged in harvesting to penetrate them in a boat 🤓 
Plant the area you choose. The seeds will be required to grow. Live wild Rice seed can be purchased from either a local supplier or grower. Seeds should be soaked in water before “planting.” The planting Simply drop the seed in water and either scatter it from a boat, or throw it from the shore. The seeds can also be planted in autumn, when they will rest dormant until the spring. . Place the seed in mud and place it in a wooden case. Then, wash the box with clean water. If the seed cannot germinate, it will be destroyed. A hectare of plants will require approximately 20 pounds (or more) of wet seeds. Samuele Alonzo amended this on August 5, 2020. 
Refugeforums.com It also helps me to explain why my luck has been better, even though it’s not always perfect. In June of many years, I hand-cast it in the shallow parts of two ponds. I’m having the following: water levels dropped to due receiving no rain These areas were transformed into mud flats over the following 30 days. The’s having geese had struck the areas where I had had planted the seed. When I returned to check on the situation, it was clear that there had not been any rice plants yet. It may have also helped that duck hunting took place in areas other than near shores. Carl Castillo, Mesa (USA) on August 3, 2021 amended this article 
More reading available gardenguides.comWild rice should not be planted in the supermarket. The processing and drying processes used to make the product unlikely to germinate. You should use wild rice seed that has been freshly harvested or purchased from a supplier. Wild rice seeds are only viable for four weeks after being harvested if it isn’t stored within reach. Freezing water. If the fall is not ready for planting within four weeks, keep it cool. Water between 33 and 35 F until you can plant in the spring. In the latter part of summer, wild rice harvest is completed North CarolinaThe seeds sprout approximately 4 to 4 and 1/2 months after they germinate.