13-13-13 Need a fast answer

I'm pretty sure 13-13-13 is a general fertilizer. In other words, it will fertilize everything, including weeds (the stuff you don't want to grow).

ETA: I wouldn't use it on a St. Aug. lawn. This should be fine if applied correctly:



I've added iron too and it seems to help with making a darker green color.

Should be ok just dont spread too much

Yes it's a multipurpose fertilizer.

A few things on fertilizer, it can burn the lawn if you put it on too heavily. Ideally you want to fertilize near a rain so that the fertilizer can get watered in and not burn your lawn. Also for grass there are slightly better mixes for future use. Grass normally likes a little more amonia.

I keep it handy in tubs. I shake it on every now and then just before a rain

Kinda late but sure you can.

Not sure if you know this or if you do and just weren't sure about THAT perticular combination for St. Augustine but the three numbers in a fertilzer label represent Nitrogen, Phosphorus and Potassium (NPK).

I'm not an expert but having had a farm/cattle operation (which is really grass farming- cattle eat grass and convert it to meat so you sell grass, really)I learned just enough to get me in trouble.

The 3 numbers tell you how much available nitrogen (N), phosphorous (P) and potassium (K) is in any given fertilizer. The numbers are stand, always appear in the same order. A number that reads 10-20-5 represents a complete fertilizer that contains 10 percent nitrogen, 20 percent phosphorous and 5 percent potassium.

Generally speaking, nitrogen is for leafy part, phosphorus for the roots and potassium is like a vitamin of sorts.

In a garden, for example, you wouldn't want a lot of nitrogen for a root crop such as potatoes. Well, really you don't want TOO much fertilizer in a garden period. More people ruin them from over fertilizing than not.