3/29/2019 – Applied 2 cups of 34-0-0 in our double 22 ft row based on
|Stage||Number of Leaves||Amount to Apply per Acre||Total Applied for Season*|
|Pre Plant||4||20 units||40|
|Roots Established (2 weeks after planting)||5||20 units||60|
|Slow Growth (every 2 weeks)||6-8||20 units every 2 weeks for 3 applications (6 weeks)||120|
|Rapid Growth before bulbing||9-11||20 units every 2 weeks for 2 applications (4 weeks)||160|
|Bulbing||12 (100 days after planting)||Quit any additional applications||n/a|
Table 2: Timing of applications of Nitrogen in onions.
*Assuming 20 units of N in soil testing
For home gardeners, the rate of Ammonium Sulfate to apply 20 units per acre is 1 cup per 20′.Dixondale
Also spread 34-0-0 on the garlic but less than for the onions. Also spread lightly on the multiplying onions.