CSU Extension Master Gardeners Notes 711 explains what is Nitrogen "side dressing" and how to use it in your garden. This information is provided to our readers for information purposes and we strongly suggest that you consult your master gardener or CSU Extension Services before application for best results.
Vegetable | Timing | Application Rate (Based on rate of 0.1 lbs. actual N per 100 square feet) | ||
Ammonium sulfate 21-0-0 | Ammonium nitrate 34-0-0 | Water soluble fertilizers | ||
Asparagus | 1) early spring 2) at end of harvestseason | 0.5 lbs. fertilizer per 100 sq. ft. (approximately 1 cup) Sprinkle over soil and water in, OR place in furrow to side of plant. CAUTION: an over application will burn roots, stunting or killing plants. | 0.3 lbs. fertilizer per 100 sq. ft. (approximately 2/3 cup) Sprinkle over soil and water in, OR place in furrow to side of plant. CAUTION: an over application will burn roots, stunting or killing plants. | See label of specific product. Water soil with fertilizer added to water. Low burn potential, but significantly more expensive. |
Sweet Corn | 1) 12” tall 2) one month later | |||
Leafy green vegetables | 3-4 weeks after emergence | |||
Onions | 3-4 weeks after emergence | |||
Potatoes | Late-July to early-August | |||
Tomatoes, peppers, and eggplants | First fruits 1” diameter | |||
Cole crops (broccoli, cabbage, cauliflower) | 1) 2-3 weeks after transplanting 2) 4-5 weeks after transplanting | See label for specific product. |
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