Remember that where organic fertilizers are concerned, there is no "guranteed analysis", unless you analyze each batch. It is why many organic products do not often display the NPK values on the front but are shown as percentages on the back of the package. The nutrient values in organic sources depends on the quality of the sources, temperature, and the presence of a healthy soil web to break the organic fertilizer down to a form that is available to plants. Some organic nitrogen are more readily available than others and animal sources of nitrogen are usually richer than plant sources of nitrogen. Fish meal is moderately available, Blood meal is relatively fast. What is stated in the package will be total nitrogen. The nitrogen in the form of ammonia is more readily available than nitrogen bound to proteins. The organic nitrogen numbers on the label are usually a lot lower than synthetic forms. At best maybe 50% of the organic nitrogen might be readily available , the rest may take up to two years to be converted into an available form by soil organisms.
Where the nitrogen is applied matters as well. There are nitrifying and denitrifying bacteria in the soil. One makes more nitrogen available the other releases the nitrogen back to its gaseous form back to the environment. Nitrogen on the surface will volatize faster than nitrogen that is buried.
Nitrogen should be applied at intervals when the plants need it. It makes it difficult to plan it out with organic fertilizers since they are better at releasing nitrogen slowly over time. You don't want or need a lot of nitrogen when you plant seeds. The nitrogen requirements go up when the true leaves come out and the plant is actively growing. This is usually when organic sources of nitrogen usually have a harder time keeping up with the demand. Don't forget, the plants only get the leftovers. The soil microbes are converting the organic matter, not for the sake of the plants, but to nourish themselves first.
Happy gardening in Hawaii. Gardens are where people grow.