I get the kelp meal from the local feed store, It is a mineral suppliment for horses or possibly cattle. This is where I get the seed meal as well. The kelp meal is rather expensive but if you buy it by the sack, it is not too bad ($50-60 I think). Because it is only a 1/4 part to the mixture the sack should last a couple / few years for sure. The seed meal goes quick but that is dirt cheap. Whatever you do dont buy the small boxes of any of this from a garden supply store, you will spend way too much. If you cant afford or find kelp meal, leave it out. It is realy just a luxury to add all these wonderfull trace minerals & nutrients to your family's diet. I am certainly not an expert but this is what I have been reading. I also make and use lots of compost but only to add organic material to my soil or to add some nice light loamy material to spread over some newly planted seeds. I dont believe that the requirements my garden needs would be remotely satisfied by what my or any compost could deliver..