I have had good results with figs using Osmocote 15-15-15. I primarily use it on my potted figs since with many larger in-ground trees, it would be a little expensive to use.

In a container: I suppose initially, it depends on your growing mix. Osmocote only offers NPK. It does not offer any of the secondary macronutrients or the micronutrients. If you use the Osmocote (14-14-14?), you will also want to supply your container with a supplemental feed as well. I have seen some slow release fert that has are more complete than Osmocote.

In the ground: you may want to have your soil checked before adding too much fertilizer then add anything that might be deficient. It is generally regarded that in situ trees gain most all they need from the ground (that is after all, why they send roots far and wide). It is a fact, however, that the soil is different in one part of the world from another. Your local agricultural extension might have more information.

~james

Actually, James, my Osmocote is 14-14-14. In addition, I add the recommended amount of Micromax Micronutrients to the potting mix. Micromax contains the following minerals:

Calcium (Ca) . . . . . . . . . . . . . . . . . . . . . . . . . . 6.0%
Magnesium (Mg) (Total). . . . . . . . . . . . . . . . . 3.0%
0% water soluble magnesium (Mg)
Sulfur (S) . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.0%
12.0% combined sulfur (S)
Boron (B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.1%
Copper (Cu) . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0%
1.0% water soluble copper (Cu)
Iron (Fe) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17.0%
16.0% water soluble iron (Fe)
Manganese (Mn) (Total) . . . . . . . . . . . . . . . . . 2.5%
2.5% water soluble manganese (Mn)
Molybdenum (Mo) . . . . . . . . . . . . . . . . . . . . 0.05%
Zinc (Zn) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0%
1.0% water soluble zinc (Zn)

mountainman0826,

what is the dosage that you use on your potted trees using osmocote14-14-14??

Osmocote rates are given on the Scott's website. This is for the "professional" version of Osmocote Classic 14-14-14. There really doesn't seem to be much difference between the professional and home versions other than the size of the container the stuff comes in.

Rates for containers for the 14-14-14 are on page eight for the smaller containers and page ten for larger containers. The amount per container size is listed in grams.

~james

Here is a link that might be useful: Osmocote application rates

Following is the formula for the potting mix that I use for figs. In reading my formula, I noticed that I listed Osmocote 13-13-13. It makes sense since Scott's lists 13-13-13 as a longer term product. The application rate is about 6.5 oz. or 182 g. / cu. ft.

Soil Recipe for Figs

3 Parts Pine Fines (2 cu. ft.) = about 12.9 dry gallons

1 Part Turface (.66 cu. ft.) = about 4.3 dry gallons

1 Part Perlite (.66 cu. ft.) = about 4.3 dry gallons

1 Cup of Powdered Dolomitic Lime

Osmocote 13-13-13 Fertilizer (1 cup = 244 g., 28 g.= 1 oz.) Â Recommended Application Rate for medium sensitive nursery stock is 6.5 oz./cu. ft. = 182 g./cu. ft. 182 g/cu. ft. x 3.32 cu. ft. = 604.24 g. total = about 2.5 cups of 13-13-13 per batch of 3.32 cu. ft.

ScottÂs Micromax Micronutrients- Recommended Application Rate for nursery stock/pot plants is 1 oz. (about 30 g.)/cu. ft. (1 oz. = about 4 level teaspoons.) 3.32 cu. ft. x 30 g./cu. ft. = 99.6 g. or 12.4 level teaspoons or slightly over 4 level tablespoons per batch of 3.32 cu. ft.

(Volume of Soil Batch is about 3.32 cu. ft. or about 21.3 gallons  I mix it in a large wheelbarrow.)
1 cu ft. = 6.4285 US dry gallons