Plant Nutrients

Roles Of The Essential Nutrients In Plant Development:

Sixteen plant nutrients are essential for proper plant development. Each is equally important to the plant, yet each is required in vastly different amounts.
Primary (macro) Nutrients:
Nitrogen:
  • Necessary for formation of amino acids, the building blocks of protein
  • Essential for plant cell division, vital for plant growth
  • Directly involved in photosynthesis
  • Necessary component of vitamins
  • Aids in production and use of carbohydrates
  • Affects energy reactions in the plant
Phosphorus:
  • Involved in photosynthesis, respiration, energy storage and transfer, cell division, and enlargement
  • Promotes early root formation and growth
  • Improves quality of fruits, vegetables, and grains
  • Vital to seed formation
  • Helps plants survive harsh winter conditions
  • Increases water-use efficiency
  • Hastens maturity
Potassium:
  • Carbohydrate metabolism and the break down and translocation of starches
  • Increases Photosynthesis
  • Increases water-use efficiency
  • Essential to protein synthesis
  • Important in fruit formation
  • Activates enzymes and controls their reaction rates
  • Improves quality of seeds and fruit
  • Improves winter hardiness
  • Increases disease resistance
Cheapest source I have found for a fertilizer that contains a proper balance of the above ingredients is:
Premium Garden Fertilizer 16-16-8