To reduce a time lag from installation of a fertilizer container until an elution start of a fertilizer, when the fertilizer container is installed so that its major axis is placed in the horizontal direction (in the laterally suspended state) in a laver cultivation area.

This fertilizer for laver culture includes in terms of anhydrides, 0.5-25 pts.mass one or more kinds selected from a group comprising calcium chloride, calcium nitrate, magnesium chloride, magnesium nitrate and hygroscopic urea to a 100 pts.mass fertilizer as it is containing nitrogen and/or phosphoric acid (excluding calcium nitrate and magnesium nitrate).