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Non-Nitrogen Fertilizers
Phosphorous & Potassium Fertilizers | Complete Fertilizers | Medium & Low N Fertilizers
Simple Phosphorus and Potassium Fertilizers
Simple phosphorous and potassium fertilizers (Table above)
are salts of a positively (+) charged potassium and or negatively charged (-)
phosphate ions. Phosphates rocks tend to be insoluble. However, potassium
phosphate is very soluble and a good fertilizer. Phosphates are necessary for
flower and fruit development while potassium is vital for root growth.
|
N-P-K Values |
Simple Non-Nitrogen Fertilizers |
Warm or CoolSeason |
Quick or SlowRelease |
Foliar |
Acidity |
|
0-45-0 |
Triple superphosphate. Must be used as a preplant. Very insoluble |
W |
SR |
No |
Neutral |
|
0-20-0 |
Single superphosphate. Must be used as a preplant. Extremely insoluble |
W |
SR |
No |
Neutral |
|
0-50-30 |
Potassium phosphate. Very soluble |
C&W |
QR |
Yes |
? |
|
0-0-50 |
Potassium sulfate |
C |
QR |
No |
Neutral |
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