Fertilizer Basic Facts
The information you REALLY
need to know.
1. The Analysis: N-P-K Ratio
N = Nitrogen: Nitrogen promotes
top growth and a health green color. (Excessive
nitrogen in the humid summer can promote disease)
promotes good root development and growth. (Most
important when starting new seed)
K=Potassium: Potassium promotes
a better vascular system for strong stems and transfer
of nutrients as well as stress resistance and cold
2. Primary Micro Nutrients:
Iron is required for chlorophyll synthesis to keep a green lawn (Can reduce amount of needed nitrogen)
Sulfur to help neutralize alkaline soil & helps prevent some types of fungus (Can reduce amount of needed nitrogen)
3. Nitrogen release rates:
are three basic forms of nitrogen in fertilizer:
Ammoniacal (Fast release high burn potential) highly soluble Low cost
Urea (Fast release - moderate-high burn potential) Highly soluble Low Cost
or Poly-coated Urea (Slow-release very-low burn potential) WIN or water insoluble Higher cost
A balanced fertilizer is always a better choice.
4. Percent and Amount of ingredients:
Many fertilizers claim to cover 5000sq.ft. some have 15# some have 18# and others have 20#
Check out the percent of N-P-K and other nutrients versus the weight of the bag of fertilizer.
Most chain stores and supply houses offer Ag grade products that appear to be cheap but the truth is in the numbersWhy
is high sulfur good?
acid source helps neutralize the alkaline soil
to make the natural soil elements more available
for plant uptake.
Studies & tests
indicate it helps prevent some fungus types.
is high iron good?
iron (ferrous sulfate) eliminates or substantially
reduces iron chlorosis (yellowing).
rich, lush deep green color.
is pH important?
(either Alkaline or Acid) ties up many natural
soil elements making them unavailable for plant
little variation in soil pH accelerates alkalinity
or acid content rapidly. It is exponential in that
8.0 pH is 10 times, 9.0 pH is 100 times & 10.0
pH is 1,000 times more alkaline than neutral 7.0.
pH is most suitable for good grass (lawns)?
6.5 to 7.0 (slightly acid).
areas of the U.S. are considered neutral to highly
- Central & Western
US including Minnesota, Iowa, Northeast Kansas & all
most states west of the Missouri River.
Usable Nutrients -- Add all nutrient percentages
together listed in the guaranteed analysis (example:
19+4+2+16+12 = 53% of contents usable) and compare!