A 32 percent nitrogen product requires surprisingly little material to deliver a moderate spring feeding.
Why I did it this way
My 32-0-4 spring fertilizer with iron plan targeted roughly 0.4 to 0.5 pound of nitrogen per 1,000 square feet. That equals about 1.25 to 1.56 pounds of product per 1,000, not four pounds.
What I used
- 32-0-4 fertilizer with iron
- Broadcast spreader
- Scale
- Broom for concrete
- Irrigation gauge
What I did
- I calculated the product rate from the nitrogen target. Divide the desired nitrogen rate by 0.32. For 15,000 square feet, the planned total is about 18.75 to 23.4 pounds.
- I used a calibration area. The setting discussed for my spreader was only a calibration starting point, not a guaranteed rate.
- I made a perimeter pass. Create a controlled boundary before filling the interior with straight lanes.
- I kept the overlap consistent. Use roughly 6 to 12 inches depending on the spread pattern.
- I closed the gate while turning. Stopped spreaders create dark stripes or burns.
- I swept the iron-containing granules off concrete. Iron can stain hard surfaces.
- I watered according to the label. Avoid frozen ground, saturated soil, or heavy runoff-producing rain.
What I learned
- Confusing pounds of fertilizer with pounds of nitrogen
- Emptying a 50-pound bag because it is available
- Leaving iron granules on concrete
- Fertilizing a waterlogged zone
My result
The lawn received one restrained spring feeding. I limited broadleaf treatment to fence lines and skipped preventive grub control instead of stacking every optional treatment.
Know your limits
Stop if the lawn is saturated, a spreader will rut the soil, or the current label conflicts with a remembered setting.