What is N-P-K?
What is N-P-K?
When you see numbers like 10-10-10 or 12-6-6 on a fertilizer bag, you’re looking at its N-P-K value. These three numbers tell you what nutrients the fertilizer provides—and what those nutrients help plants do.
Think of N-P-K as a plant’s diet:
N = Nitrogen (Leaf & Green Growth)
- Helps plants grow lush, green leaves
- Essential for lawns, evergreens, and leafy plants
- Too little = pale or yellow leaves
- Too much = lots of leaves, fewer flowers
P = Phosphorus (Roots, Flowers & Blooms)
- Encourages strong roots
- Supports flowering, blooming, and fruiting
- Especially important for newly planted trees, shrubs, and flowers
K = Potassium (Overall Health & Strength)
- Improves overall plant health
- Helps plants handle heat, cold, drought, and disease
- Think of this as a plant’s immune system
What Do the Numbers Mean?
Example: 10-10-10
- 10% Nitrogen
- 10% Phosphorus
- 10% Potassium
A balanced fertilizer (like 10-10-10) feeds the whole plant evenly, while a targeted fertilizer boosts a specific need (like blooms or root growth).
Choosing the Right Fertilizer
- New plants? Look for higher phosphorus to help roots establish
- Leafy growth or evergreens? Nitrogen is key
- Flowering plants or stressed plants? Potassium helps keep them strong
If you’re ever unsure, our team can help match the right NPK to your plant and the time of year.







