How To Make Organic Fertilizer
fertilizers don't have to be expensive, since you can make your own. If you
buy the components in bulk, you'll save even more! |
Recipe For Organic Fertilizer
been using this recipe, which to the best of my knowledge was created by Steve
Solomon (founder of Territorial Seed Company), for six years now with good
results. One word of advice: Instead of buying the components in small boxes,
buy bulk bags (40-50 lbs.) at a farm supply or feed store. As long as you keep
them dry, they will last for many years.
component provides nitrogen, with smaller amounts of phosphorus and potassium.
I like to use cottonseed meal, which is cheap (about $13.00 for a 40 lb bag)
and easily available. In some states, though, it is not allowed in a certified
organic operation (not something a home grower needs to be concerned about).
Other options are alfalfa meal, or rape/canola meal. Cottonseed meal has a
NPK value of around 6-2-1.
meals tend to be acidic, so lime is included to balance that out. Dolomite
limestone is roughly half Magnesium Carbonate and half Calcium Carbonate. Calcitic
limestone is pure Calcium Carbonate. Plants usually need more calcium than
magnesium; so, if you want to be really tricky, use 1/3 part dolomite lime
and 2/3 part calcitic lime.
Bone Meal And Rock Phosphate
ingredients make up the bulk of the phosphorus component. Less bone meal (NPK
~ 0-10-0) is required since it releases its phosphorus more readily. The advantage
of using rock phosphate (NPK ~ 0-3-0) is that it continues to contribute phosphorus
to your soil over many years.
meal (NPK ~ 0-0-10) contributes potassium, and also many micronutrients. This
tends to be more expensive than the other components: I recently paid $35.00
for a 50 pound bag.