These are both perennials. They both produce lots of seed. The manna, when mature, will be the first long green grass floating on the water in late December. These are some of the only grasses, that once established, can thrive under water for the winter. Both produce great natural habitat for the invertebrates that the ducks love in addition to seed.
Planting Instructions: For general ground prep (click here).
Plant 15-20 lbs per acre on surface to 1/2" deep.