Phosphorus (P) - How to Grow Plumeria

Phosphorus is a primary plant macronutrient, especially important for flower production. In fertilizer, usually expressed as phosphate.

Fertilizer Basics
How To Foliar Feed Plumeria
Manure and Compost as Nutrient Sources
Understanding Fertilizer Material
Glossary: Macronutrients
From a management perspective only, the primary nutrients are N, P, and K, because they are most often limiting from a crop production standpoint. All of the other essential macronutrient elements are secondary nutrients because they are rarely limiting, and more rarely added to soils as fertilizers.