Now this is a cool idea! Some algae have very nice balance of trace and micro nutrients, as well as som n and k. Plus, if it’s freshwater it probably won’t be loaded with sodium like kelp.Anyone collected the seaweed like algae in freshwater streams and used as fertilizer? I have access to an ever growing supply that I have collected recently, rinsed, dried, dehydrated and ground into powder like a kelp meal.
these types of algae do not accumulate toxins so should be safe to use.
I have added it at about tbsp of powder per gallon soil to a couple of large bins of my soil that is recharging and top dressed other plants and veggies.