Sea weed extracts (alginic acid) are very good for plants ! They contain a lot of vitamins, trace elements, and other stuff that helps plants grow and thrive. I always used to mix bent grass seed, with granular kelp when overseeding greens. I used to buy it in 40 lbs bags for $30. Now it's over $100. I add it to my organic mix with other amendments . Bottom line is it's good stuff !! Is the Blue Planet stuff use for flowering ? I'd like to try it . Thanks