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Yard Mastery 7-0-20 Summer Stress Blend Fertilizer

Multi Purpose Lawn Fertilizer

Yard Mastery 7-0-20 Summer Stress Blend Logo
The Yard Mastery team is excited to bring you custom fertilizer blends made just for DIYers. Stress Blend was actually the "breakout star" fertilizer of 2020. We released this blend last year by sending it out to several of our partners to try and the results were even greater than imagined. So much so that we publicly released it to our customers in smaller bags and got awesome feedback. Now we have it in 45lb bags that cover 15,000 sq ft.

Even to this day Allyn can't figure out why it delivers the results it does. It's great fert for sure, but the color pop that we see from it is beyond our expectations.

Maybe it's the amount of potassium releasing nutrients somehow, or maybe it's the 3% iron or both.

Surely it can't be the 7% nitrogen because all 7% is slow release so while that does bring some color at that low amount it shouldn't be producing the results it does.

Either way, this combination has greened up lawns from Bermuda to St Augustine and Zoysia and dozens of cool season lawns too.

It's also excellent for Centipede since you don't want to push it too much, you could use this almost year round on your Centipede lawn and be in good shape.
Active Ingredient %
Potassium 20.00 %
Nitrogen 7.00 %
Iron 3.10 %
Magnesium 2.00 %
Manganese 0.12 %
Copper 0.10 %
Zinc 0.10 %
Molybdate 0.01 %
Other Ingredients 67.57 %
Available on Yard Mastery

$1.22 / lb
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Not Safe On
No not safe on treatments listed. Please, review the label or contact the merchant for more information.
Water Instructions
Be sure to water it in with at least 0.25" of irrigation or rainfall within 24-48 hours of application.
Fertilizer & Nutrient Analysis
Broadcast Application
Label Rate:
3 lbs per 1,000 sqft
Fertilizer NPK Ratio:
7 - 0 - 20
Label Rate Nutrient Analysis:
Ingredient % Mass / Area
Nitrogen 7% 0.21 lbs / 1,000 sqft
Potassium 20% 0.6 lbs / 1,000 sqft
Magnesium 2% 0.06 lbs / 1,000 sqft
Copper 0.1% 0.003 lbs / 1,000 sqft
Iron 3.1% 0.09 lbs / 1,000 sqft
Manganese 0.12% 0.004 lbs / 1,000 sqft
Molybdate 0.01% 0.0003 lbs / 1,000 sqft
Zinc 0.1% 0.003 lbs / 1,000 sqft
Label Rate Cost Effectiveness:
Covers 15000 square feet
at a cost of
$3.67 per 1,000 sqft
Nutrient Mass:
Total Nutrient Cost Analysis:
Ingredient Total Mass Cost / Mass
Nitrogen 3.15 lbs $17.46 / lb
Potassium 9 lbs $6.11 / lb
Magnesium 0.9 lbs $61.10 / lb
Copper 0.04 lbs $1222.00 / lb
Iron 1.4 lbs $39.42 / lb
Manganese 0.05 lbs $1018.33 / lb
Molybdate 0.005 lbs $12220.00 / lb
Zinc 0.04 lbs $1222.00 / lb

Yard Mastery 7-0-20 Summer Stress Blend Optimized Application Label Rate Calculator

No Control
Broadcast Treatment:
Grass / Turf Types Safe
Annual Ryegrass
Chewings Fescue
Colonial Bentgrass
Fine Fescue
Hard Fescue
Kentucky Bluegrass
Kikuyu Grass
Perennial Ryegrass
Red Fescue
St. Augustinegrass
Tall Fescue
Jump to CertainLabel™ Yard Mastery 7-0-20 Summer Stress Blend Label Rates & Calculator for these 18 turf types
Broadcast Treatment
Label Rate:
3 lbs per 1,000 sqft
Cost Effectiveness:
Covers 15000 square feet
at a cost of
$3.67 per 1,000 sqft
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