Quote:
Originally Posted by Olafhenny
..., any fertilizer consists of only three
elements: Nitrogen (first number) Phosphates (second number) an the third number: Potassium. ... Everything else is trace elements.
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The primaries are Nitrogen, Phosphate, Potash, and CO2.
The secondaries elements are S, Mg, and Ca.
The micronutrients are Fe, Cu, Mn, Zn, B, Co, Mo.
The quantity and dosage of each is very dependent upon the plant, the local environs, and the use of the plant. For example, a professional golf course will use 20-0-30 (including secondaries and micros) the majority of the time and occasionally supplement with a minor amount of phosphate.
Miracle Gro is simply agricultural fertilizer repackaged in consumer-size containers. Their water-soluble formulas are made of dehydrated minerals and amino acids; many of their formulas also contain a blue dye made from violets. The dye is present in the agricultural formulas so that when it is applied by airplane the pilot (wearing polarized lenses) can see where they have sprayed.
Miracle Gro fertilizer and other fertilizer brands are available in a large number of formulas. Picking one that has ratios of ingredients designed for your crop is important if you want good results.