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The paper documents short-time effects of the application of materials based on the marine algae, both of fossil and recent origin, i.e. fossil alginite and recent preparates of the Bio-Algeen system, respectively. Alginite effects were studied at the research plot Hovorcovice, in the relatively arid and warm site in the Polabi region, at the agricultural land afforestation (by English oak, American red oak, Norway maple and Scots pine), Bio-Algeen system was tested at Norway spruce production in the forest nursery. In the plantation experiment, significantly lower mortality was documented in the first year since planting, as well as significantly faster growth for broad-leaved species. In the nursery experiment, considerably more favorable development of the root system was detected as well as better parameters of the above-ground part of the planting stock. As the most effective, the combination of root dipping to Bio-Algeen water solution with granulate application on bed surface and also spraying of aboveground part of seedlings after transplanting were documented. Application of studied material so represents good contribution for good quality stock production and plantation success on the forested site.