What are the nutrients in it and what in what amounts? The thing about 'citrus fertilizers' is that there is no established standard for them. One brand may be high in nitrogen, another high in phosphorus etc. Most fertilizer makers just slap names on their products to sell more fertilizer with no regard to whether it's actually ideal for the plant or not.

In other words how suitable a fertilizer is for any plant has nothing to do with what it's called, but what is actually in it and in what amounts.

13-7-13 Miracle Grow Shake-N-Feed

Should be fine. You might want a little more nitrogen, but see how it goes.

Also be aware that it lacks any calcium whatsoever. If you are using a potting mix that has been limed or had gypsum added and your water has a good amount of calcium in it (hard water) it may be fine, but otherwise you will need a source of Ca eventually. In some places tap water has lots of calcium and in others it doesn't. If you have a water softener or you quickly get deposits at the base of the sink faucet then you have lots of Ca in your water.