To see what Greenfield Citrus Nursery has to say about fertilizing citrus in Arizona just follow the link. http://www.greenfieldcitrus.com/grow.htm As far as foliar feeding goes it can be helpful in keeping the leaves green. The seaweed and fish emulsion also helps prevent damage from some pests. The vinegar in a foliar feed I don't think is advisable. Vinegar is used to lower ph in soil by adding it to the water you water your trees with. Vinegar is also used as a herbicide and can kill plants and leaves if sprayed on the foliage in high doses. Our water company is SRP and spraying the leaves often with water where I'm at is not advisable because our water is hard. The hard water deposits can build up on the leaves and damage the foliage. A few drops of vinegar per gallon may prevent the deposits from accumulating. Is that why you are using it?

Thanks for the reply. Do they harm the tree and how do I get rid of it?

The reason i mulch is that grass steals water and nutrients from the tree. Keeping the drip area or farther open helps the tree. Yes 4 feet beats three and is worth it IMHO. I mulch to slow down the grass and weeds. Everything else is gravy. As far as Redwoods and 13-13-13 is people forget we are not talking about forest trees here. A peach tree left on it's own will bear so much fruit it's branches will break and invite disease in. Needless to say it will die. We are talking about feeding domesticated trees, not wild ones. The fruit trees will not survive without our care. Well many of them. Also don't let dwarf fool you, not many trees are genetic dwarfs, so they are reduced by rootstock selection. This method doesn't work that well. 15 feet tall is very possible. Unless you have genetic dwarfs the best way to control size is by pruning to the height you desire and forget about rootstock, use dwarf, semi-dwarf or regular. I find the non-dwarfing rootstocks are darn good, and I prefer to use them. Like Lovell for peaches. I do like using dwarf rootstock for cherries though. They bear faster and produce well.

The suckers also "suck" nutrients from the tree and will slow both the growth and ripening process i would remove them but if it's not on a rootstock it's totally up to you, you could essentially let one grow from the base and form a second trunk but I wouldn't recommend it, that's a technique for replacing aged fruit trees which doesn't sound like its your case