Example: the recommendation is to apply 1.5 ounces of nitrogen per 100 sq. ft. and you want to supply the nitrogen using nitrate of soda (15-0-0).This fertilizer is 15% (0.15) nitrogen by weight.
1.5 ÷ 0.15 = 10 ounces of fertilizer
Use Louisiana State University, (PDF)Tons to Teaspoons to convert weight to volume measurements.
Soil pH- 6.0
Year 1- fertilize with 0.30 ounces of nitrogen (N) per 10 ft. of row six weeks after planting and again in August
Year 2 and older- fertilize with 0.30 ounces of nitrogen (N) per 10 ft. of row in August
Soil pH- 6.0
Year 1- fertilize with 0.90 ounces of nitrogen (N) per 10 ft. of row once a month, June-September
Year 2 and older- fertilize with 0.60 ounces of nitrogen (N) per 10 ft. of row once a month, May-September
Soil pH- 6.0-6.5
Year 1 and 2- fertilize with 0.80 ounces of nitrogen (N) per 10 ft. of row at flowering
Year 3 and older- fertilize with 1.6 ounces of nitrogen (N) per 10 ft. of row at flowering
Soil pH- 5.8-6.5
Year 1- fertilize with 0.30 ounces of nitrogen (N) per plant at planting
Year 2- fertilize with 0.30 ounces of nitrogen (N) per plant at flowering
Year 3- fertilize with 0.40 ounces of nitrogen (N) per plant at flowering
Year 4- fertilize with 0.80 ounces of nitrogen (N) per plant at flowering
Year 5 and older- fertilize with 1.60 ounces of nitrogen (N) per plant at flowering
Soil pH- 4.3-5.3
Avoid fertilizers containing nitrates or chlorides.
Year 1- no fertilizer
Year 2- 2.0 ounces of 21-0-0 (ammonium sulfate) per plant during bloom, and the same amount 3 weeks later. Scatter in a ring 12 in. to 18 in. from the plant.
Year 3 and older- increase by 1.0 ounce per year until the 6th year; then use 8.0 ounces per plant each succeeding year.
Soil pH- 6.0-6.5
Year 1- broadcast 0.80 ounces of nitrogen (N) over a two-foot circle, one month after planting. Keep the fertilizer six inches away from the trunk and broadcast it evenly. Do not put any fertilizer in the hole before planting. Broadcast another 0.80 ounces of nitrogen (N) around each tree in June.
Year 2 and older- apply fertilizer in spring and increase the amount of nitrogen applied by 0.40 ounces per year up to a maximum of 4.0 ounces nitrogen (N) per tree (dwarf); 8.0 ounces nitrogen (N) per tree (semi-dwarf); and 1 lb. nitrogen (N) per tree (standard)
Reduce these fertilizer rates if trees become overly vegetative, producing more than 12 to 18 inches of new shoot growth per year).
Soil pH- 6.0-6.5
Year 1- fertilize with 0.80 ounces of nitrogen (N) per tree prior to planting. Do not place fertilizer in the planting hole.
Year 2 and older- broadcast 0.80 ounces of nitrogen (N) under each tree in early spring. Increase the amount applied by an additional 0.80 ounces of nitrogen (N) per year up to a maximum of 8.0 ounces per tree regardless of age.
Never fertilize after July 15. Late fertilization encourages soft growth which may be winter-killed and interferes with the trees over-all ability to harden-off for the dormant period.
Author: Jon Traunfeld, HGIC Director and Extension Specialist, Fruits and Vegetables.
10/2020