8 - 3 - 9 indicates its a fertilizer thats 8 parts nitrogen, 3 parts phosphorous and 9 parts potassium or its NPK value.
if its granular its a chemical fertilizer, make sure its a slow release formula so it doesnt burn and use sparingly, Osmocote is a good brand.
if it contains trace minerals it should say it on the label (Palm fertilizers usually do).

in most plants Nitrogen promotes growth, phosphorous promotes flowering and blooms, and potassium promotes root growth
some plants like citrus are nitrogen needy, bananas tend to like more pottassium. i use a foliar spray for trace minerals on my citrus.

The common 8-3-9 produced by AFEC is meant for ground application. You might get away with using it on potted plants if you're careful, but I've lost plants doing that :-). Personally, I prefer to incorporate a slow release with minors (eg, osmocote) into my potting mix at the rate of about 1.5 pounds per 45 gallon container.

Jeff

Thanks for the info mango kush

Most plants use NPK in a 3:1:2 ratio, fairly consistently throughout the vegetative, bloom, and fruiting cycle.
A plant is limited by the least available nutrient, so adding an excess of N, P, or K won't promote growth
or bloom unless the deficiency is first addressed. Sometimes, fig-growers in marginal zones will limit N
to hurry along the harvest, but that's an exception.

I can't stress enough the importance of the minors.

I, too, mix Osmocote slow-release into my Citrus container soils,
and I fertilize with a 9:3:6 fertilizer that includes the micro-nutrients.

Josh

Thank you all.
Mango Cush Interesting! I did not know about the specific needs of a citrus(I don't have any),what kind of foliar do you use?
Jeff that is what is really important to me, finding the best fertilizer for "Container" Fruit because I really don't know if one that works great for the ground will also work in a pot.
JOsh that's exactly where I was going with this. I was wondering if the Foliage Pro 9-3-6(has minors) was not better than the 8-3-9 + minors. Are there any difference or either one is good as a basis fertilizer?
What do you guys think?

Is there any place in Miami, that carry the 8-3-9-
fertilizer?

Call Pine Island Nursery. They should have

i use the alaska fish emulsion 5-1-1 mixed with their 0-10-10 formula.. making my mixture 5-11-11

Is the proper osmocote fertilizer the 19-6-12 smart release indoor and outdoor?