Propagation: Fish emulsion on seedlings?, 0 by kdjoergensen

kdjoergensen wrote:
If you use it, use between 1-3 teaspoons per gallon.

Generally, seedlings require about 100-300 ppm of nitrogen. Very young seedlings in very early stages, should probably only get 50 ppm, but shortly after 100 ppm is a minimum for most seedlings. As they mature, 200 ppm is pretty standard. heavy feeders (wave petunias etc) benefit tremendously from 300-400 ppm per watering.

I have given a link below to a PPM fertilizer chart discussion.
http://davesgarden.com/forums/t/479374

Depending on the actual brand, fish emulsion is usually 5-7% nitrogen which means that 1 tsp will give 65-100 ppm nitrogen. e.g. you would use 1 tsp on very young seedlings, 2-3 tsp/gallon for most seedling fertilizer needs, and 4-5 tsp/gallon for more aggressive seedlings.

I have also attached the same chart again, but please do see the above thread for more discussions.