CSU fact sheet on meadow fertilizer requirements.
- Nitrogen can be applied in the fall or spring depending on use of the meadow and goals of the producer, especially concerning grazing.
- Apply nitrogen fertilizers to irrigated mountain meadows on the basis of yield potential. Spring application usually is more effective than fall application.
- Apply phosphate fertilizers on the basis of soil test results. Top-dress phosphate fertilizers in the fall.
- Most Colorado soils contain sufficient available potassium and sulfur for forage production. However, these nutrients may become limiting through nutrient removal by hay.