Calculated against Washington State WSDA limits
WSDA is one of the strictest fertilizer heavy metals standards in the USA · Based on 7-4-4 guaranteed analysis · Max labeled rate 435 lbs/acre/yr (10 lbs per 1,000 sq ft)
WSDA State Max
Our lab result must be below this. Lower is better. We pass every single one.
= Max ppm in product
Our lab result must be below this. Lower is better. We pass every single one.
Metal
Arsenic
Cadmium
Cobalt
Mercury
Molybdenum
Nickel
Lead
Selenium
Zinc
Our result (ppm)
1.45
0.037
1.15
0.017
3.32
12.6
0.633
0.293
90.9
We use
0.2%
<0.1%
0.1%
<0.1%
1.8%
0.8%
<0.1%
0.2%
0.5%
Status
PASS
PASS
PASS
PASS
PASS
PASS
PASS
PASS
PASS
WSDA State Maximum values from Washington State Department of Agriculture Heavy Metals Calculator (Calculations sheet, S24–S32). Formula: Product Max ppm = (WSDA lbs/A/yr ÷ Application Rate lbs/A/yr) × 1,000,000. Application rate of 435 lbs/acre/year = 10 lbs per 1,000 sq ft, the standard maximum labeled granular rate. At every realistic application rate from 100 to 2,000 lbs/A/yr, all nine metals pass WSDA standards by large margins.
Full nutrient radar
At 435 lbs/acre/year application rate · Our result ÷ WSDA product max ppm × 100 · All metals under 2%
✓ All 9 metals pass WSDA
✓ No metal exceeds 2% of allowable limit
✓ Passes even at 10× higher application rate
WSDA = Washington State Dept. of Agriculture — one of USA's strictest standards
Full nutrient radar
CKAA vs. typical synthetic fertilizer · % by weight
CKAA (lab verified)
Typical synthetic
N-P-K macronutrient split
Verified percentages · Lab #19023FT
Nitrogen
6.67%
92% slow-release · won't burn
Phosphorus (P₂O₅)
4.51%
Roots · blooms · fruit set
Potassium (K₂O)
3.84%
Sugar transport · stress defense
Bonus nutrients — not on most labels
6.90%
Calcium · fruit hold
2.08%
Magnesium · green engine
Micronutrient levels
ppm (parts per million) · independent lab verified
What these numbers mean
ppm (parts per million) · independent lab verified
90.9 ppm
Zinc
Runs enzyme systems. Controls growth hormones. Deficiency causes stunted, twisted new growth.
29.0 ppm
Copper
Cell wall strength. Protein activation. Deficiency causes die-back at new growth tips.
3.32 ppm
Molybdenum
Nitrogen use efficiency. Needed in tiny amounts. Critical. Most fertilizers have none.
The nutrients most fertilizers don't tell you about
CKAA verified values vs. typical synthetic fertilizer (most report 0 for Ca, S, Mg)
6.90%
Calcium
Fruit that stays on the branch
Central atom of chlorophyll. No Mg = no photosynthesis.
5.24%
Sulfur (Oct 2025 lab)
Unlocks everything else
Central atom of chlorophyll. No Mg = no photosynthesis.
2.08%
Magnesium
The engine of every green leaf
Central atom of chlorophyll. No Mg = no photosynthesis.
6.67%
Total Nitrogen
Claimed: 7%
Confirmed
4.51%
Available P₂O₅
Claimed: 4%
Exceeds label
3.84%
Total K₂O
Claimed: 4%
At label
6.90%
Total Calcium
Not on most labels
6× richer than typical
2.08%
Magnesium
Powers chlorophyll
Lab verified
7-4.51-3.84
Actual NPK measured
Matches 7-4-4 label
Both tests consistent
6.67%
Total Nitrogen
Claimed: 7%
Confirmed
4.51%
Available P₂O₅
Claimed: 4%
Exceeds label
3.84%
Total K₂O
Claimed: 4%
At label
6.90%
Total Calcium
Not on most labels
6× richer than typical
2.08%
Magnesium
Powers chlorophyll
Lab verified
7-4.51-3.84
Actual NPK measured
Matches 7-4-4 label
Both tests consistent
🔬 Independent Laboratory Analysis · Two Tests · Consistent Results
What the lab found
in every bag of CKAA
Two independent tests. Six months apart. Same lab. Same product. The nutrient section uses the newest results (Lab #19023FT, March 2026). The heavy metals section uses Lab #16349FT (Oct 2025), which ran the full EPA heavy metals panel.
#19023FT
Nutrients · March 2026
Newest results
#16349FT
Heavy metals · Oct 2025
Full EPA panel
🔬 Independent Laboratory Analysis · Two Tests · Consistent Results
What the lab found
in every bag of CKAA
Two independent tests. Six months apart. Same lab. Same product. The nutrient section uses the newest results (Lab #19023FT, March 2026). The heavy metals section uses Lab #16349FT (Oct 2025), which ran the full EPA heavy metals panel.
#19023FT
Nutrients · March 2026
Newest results
#16349FT
Heavy metals · Oct 2025
Full EPA panel
