<p class="abstract"><strong>Background:</strong> <em>Coffea arabica </em>L. is belongs to the Rubiaceae<strong>, </strong>is worldwide value for the coffee beverage.<strong> </strong>This experiment is aims to prove algae as bio-fertilizer in <em>Coffea arabica </em>L. The role of BGA and moss prevent the soil as dry condition which also provide the nutrients for the crops.</p><p class="abstract"><strong>Methods:</strong> Experiment was conduct in the plastic house in Kangwon National University, using the 2 yrs. <em>Coffea arabica</em> L. seedling dividing into four groups; Algae+NPK, Algae, NPK, Control. </p><p class="abstract"><strong>Results:</strong> The height, branching and number of leaves is higher in case of Algae+NPK. The following order is observed in each group; Algae+NPK >Algae >NPK >Control with water.</p><p class="abstract"><strong>Conclusions:</strong> The algae proves that the positive role of <em>Coffea arabica </em>for growth and development which can be used for the manure in the coffee farm.</p>