The main requirements are heat, fertility, and water, much like corn. Even paddy rice does not neet to actually be in standing water. (Though water makes it easier to control weeds and add fertilizer.) Upland rice needs the same conditions as corn. Both are now being grown in the Midwest and in New England, as well as other regions that can maintain moist soil and summer days over 75 degrees. Unless you have a long growing season, you will want to start it indoors 3 weeks before last frost and transplant out to the bed, paddy, or container where the rice is to grow.