in FL .... i presume sand soil ???? sand covered in rock ... against a white wall .. i am guessing you cooked the soil they are in ... not to mention the cement walkway and driveway ... which retain heat.. deep into the night allowing no recovery period .... improper watering since you cant tell what is going on under the rock .. ... and relying on rain ..... without verifying is risky .... and baked them with reflected light.. and you may have burned the roots with the fert stake... depending on how that was done ... then sprayed chemicals on seriously stressed leaves ... burning them off.... never fertilize a recent transplant.. and dont waste your money on fertilizer stakes ... total and completely useless ... i really dont think.. there is much here to save ... unless you are willing to wait until spring.. and see how they flush out ... but i dont know if i could look at this.. all winter long.. right out my front door ... if they were new plantings... perhaps they can be replaced under warranty .. BTW .... are they new transplants.. or perhaps.. the stone and the mulch lawn was reworked???? .. significantly affecting their microculture ???? ken

use the HTML codes in your post... on preview.. if you see it.. we will see it if you already sprayed it for bugs ... then you do not spray again ... is it a recent transplant where are you did you spray it in full blinding blistering sun .. how hot was it? what is the mystery spray ... isnt it planted awful close to the house... or did you fail to mention its potted ... how big is the pot ... whats the potting media.. was it recently repotted?? ... did you recently fertilize it .. welcome to GW ... need more info ... ken

Not enough information to be able to offer you any help. I, for one, would like to know your general location on the planet (climate is an important clue), some of the plants that are affected, and pictures, if possible. Is the home new or just new to you? If so, is the landscaping new, as well? Any clues you can think of...irrigation cycles, type of soil, drainage, rainfall, etc. would be helpful.

I'm not a Meyer fan either. I think it has a lot to do with personal preference of the individual. In case you're wondering, Meyer is in a different group from other lemons. Meyer is believed to have originated from hybridization between citron and mandarin, whereas other lemons came about from hybridization between citron and sour orange. Meyer has a bit more mandarin ancestry than other lemons, so it's sweeter and more cold tolerant, though some (like me) feel it has less flavor/fragrance. For other people though, Meyer is their favorite lemon.