Foliar feeding occurs through the stomata and epidermal cells of leaves and to some extent bark. Foliar feeding can quickly correct a nutrient deficiency. In cases where the deficient nutrient is nonmobile within the plant, repeat applications ate necessary on the new growth.

A. PRIMARY ELEMENTS

1. N - Foliar sources of nitrogen are Potassium Nitrate (13-00-44). Magnesium Nitrate (7%) and Urea (46-00-00). Use Urea in combination with minors to enhance the uptake of minors at a rate of 3-5# per 100 gallons.

2. P - Foliar source of Phosphorous are PFI  20-20-20, 10-20-30, 112-48-8, and 5-11-26.

3. K - Under high rainfall conditions, Potassium can be directly leached from leaves. Foliar sources are Potassium Nitrate (13-00-44), PFI 10-20-30, 20-20-20 and 5-11-26

B. SECONDARY ELEMENTS

1. Ca - Not generally used as a foliar spray because it can easily, economically and effectively be applied as a soil application when liming.

2. Mg - Use Magnesium Nitrate (7%Mg.) or Magnesium Sulfate (16.3% Mg.).

3. S - Usually applied in a granular fertilizer program.

4. Fe - Is readily absorbed by leaf but not translocated, therefore, on severely deficient leaves, green spotting may occur where Iron was locally absorbed. Iron sources are: Sequestrene Iron, Liquid Green, and Fer-A-Gro. They can be applied as a foliar spray or soil drench.

5. Mn - Deficiency is easily corrected with a foliar spray. Use Manganese Sulfate (Tecmangam 27.8% Mn). Chelated Mn is also available.

6. Zn - Use Zinc Nu-Zox 78% or Chelated Zinc. Zinc is also contained in Fer-A-Gro and Liquid Green.

7. Cu - Usually supplied in Copper fungicide sprays.

8. B - A narrow range exists between deficiency and toxicity. Have plant analyzed to determine application rate. Use Microbor. Also contained in Fer-A-Gro.

9. Mo - Adequate amounts supplied in a granular fertilizer program.