13-13-13 Fertilizer: Complete Guide
Popular across the southern United States, this balanced granular fertilizer sits between 10-10-10 and 15-15-15 in concentration. Apply 7.7 lbs per 1,000 sq ft to deliver 1 lb each of N, P, and K. At roughly $0.60 per pound, it offers better value than 10-10-10 while staying forgiving enough for general use. Skip it if soil tests show adequate phosphorus.
Key Facts
13N
13P
13K
N 13% Nitrogen: leaf and stem growth
P 13% Phosphorus: roots and flowers
K 13% Potassium: health and disease resistance
Learn more about NPKNPK Ratio
13N
13P
13K
N 13% Nitrogen: leaf and stem growth
P 13% Phosphorus: roots and flowers
K 13% Potassium: health and disease resistance
Learn more about NPKFormgranular
Application Rate7.7 lbs per 1,000 sq ft delivers 1 lb each of N, P, and K
Price~$0.6/lb est.
Release Speedimmediate
Burn Riskmedium
Medium Risk: Moderate burn risk. Water immediately after applying.
What is 13-13-13 Fertilizer Best For?
When Should You Use 13-13-13 Fertilizer?
Use as an all-purpose fertilizer for gardens, flower beds, and new plantings.
When Should You NOT Use 13-13-13 Fertilizer?
Avoid if soil test shows adequate phosphorus levels.
Source:Clemson University Extension