I really like the way we can pinpoint fertilizing applications (and Where on the root ball we’re fertilizing) with cakes. That’s a whole discussion by itself. A number of people have asked what sort of cake to make, and that’s what I’ll offer today.
Probably the easiest method, for those who want to buy one bag and not five, is to buy premixed dry organic fertilizer, such as Whitney Farms or Dr. Earth. I know Whitney Farms sells a 40 lb. bag of 5-5-5 All-Purpose for about $30-35. If you consider that it will make twice as many cakes as are in a $100 can of imported Japanese fertilizer cakes…well, it does not seem so expensive, does it? And I think the nutritional value is about the same. Feather, fish, blood, and cottonseed meal as well as some seaweed are a few of the ingredients.
In rough strokes, you mix this fertilizer with water and some flour (a cup or two of flour per gallon, approximately.) The flour helps it hold together. You want a fairly soft dough, perhaps slightly softer than you think. If you try to make balls of it right away, they will fall apart easily. I recommend covering the wetted mixture with plastic for a week or two. The bacterial gels that form with the wait hold the mixture together, as well as increasing the strength of the fertilizer a bit. Whitney Farms fertilizer does not smell as bad as you might think, but certainly keep well away from pets and non-pet animals who might think it smells absolutely wonderful.
Use a small 1″ melon baller with an internal ratchet arm to make half-spheres. You can let these dry, or place them directly on the soil surface (like I do when I’m too busy.)