Hi Wp..It's been so gray in our part of the globe, even setting a plant in an unobstructed south window has little effect..(S) My citrus (those not in a small gh) are placed directly in front of south windows. One advantage of living in a condo, the higher up you are, the better light you get. How far apart is your unit from the other side of the building, facing south? IMO, artificial lighting isn't enough for a sun-loving plant such as citrus..If by chance you have the light/fixture hanging in front of a window, this will certainly be beneficial, but natural light can't be beat..Especially if you'd like your plant to flower/fruit. Right now, this time of year, there's really not much to do with your citrus.. Most important is light..try supplying as much as possible, though it's difficult in Il. Proper watering is mandatory. Like Sue stated, you want to water thoroughly till water seeps out of drainage holes. Before watering again, be sure the soil is on the dry side. If necessary, buy a water guage, but the easist and inexpensive way is sticking your finger in the soil. If your finger comes out dry then water, if wet, wait a few days and retest. Lifting the pot to test weight is another way to check but I prefer the finger method. Never keep the soil muddy, or sitting in water. Citrus like humidity..a humiidfer works best..(for people, also) I mist daily, plus try hosing in sink/tub once a wk. Most people don't bother, but it's something I like to do..it helps keeps foliage clean, removes dust, and gives one a chance to inspect leaves/stems for insects. It also helps increase humidity. What size pot did your citrus come in? I hope you didn't overpot..it's normally best to increase 1-2 sizes up.. Soil type is another very important matter..A well=draining soil is best..something that's not going to stay wet despite heat, dryness and time. What type of soil did you use? Did you mix your own or buy packaged. I mix my own using (I'm sure some will disagree, but it's what works for me) all purpose, sphagnum-peat, sand and Perlite..sometimes a little added charcoal/large bird grit/orchid mix.) Sand(Builder's Sand from Home Depot, not beach sand) orchid bark, and Perlite helps with drainage. Do not fertilize this time of year. Usually, it's said a plant doesn't need food after repotting in fresh soil. If you don't have citrus fertlizer you can plan ahead, and order before spring...Have you ever shopped at Jamaican Gardens in Morton Grove or Libertyville? I'd call ahead, but they had citrus fertlizer available..they also sell beautiful plants, including citrus. You can always substitute using Azalea or Palm food. Don't bother with spikes..they're a waste of money and time. And don't work. Certain nurseries on Ebay sell Citrus fertilizer. There's more to growing citrus, but for the time being, the main thing you need to do is offer sun/light, water, and provide humidity. I hope your wife had a Happy Birthday..Nothing better than a citrus for a birthday gift.. Meyer's are fantastic. Good luck, Toni

It's close to 5-1-1 mix... I sifted orchid potting soil to remove the fines, but kept the bark, measured 5 scoops of it, more than 1 scoop of perlite (but less than 2) and a little less than 1 of the soil I had sifted out...

I agree with silica: the tree has root problems which means root rot. Root rot is caused by soil mix that is too water retentive and or cold roots (below 55 F). Also, terra cota pots allow water to evaporate which causes cooling of the pots. Not a good thing! You should probably repot into a mix like 5-1-1 or gritty mix. Throw away the moisture meter. It is way too inaccurate. Check to see if it needs water by digging a couple of inches into the soil mix to see if it is damp. Alternatively, shovea wooden skewer halfway between the tree and the wall of the pot and all the way to the bottom. Pull it out and if you see particles on it, then it does not need watering. My version of Al Tapla's 5-1-1 Mix · 5 parts pine bark mulch (remove ½” pieces through 1/2 inch screen) (Some people use Repti Bark instead of mulch. They do not screen it.) Be sure to soak the bark overnight. · 1 part sphagnum peat · 1 part perlite (coarse, if you can get it) · 1 Tb garden lime /gal 5-1-1 mix (measure the 5-1-1 mix) · Osmocote plus (follow manufacturer’s instructions). This is optional. · Moisten well and wait at 2 days before using, if possible. When repotting into a different kind of soil mix, remove all of the old soil mix by dunking the root ball in and out of water. You may have to use a garden hose to gently force the old soil off. Or, use something like a screwdriver: stick it into the root ball and pull down to loosen the soil. Dunk and repeat.

Christina, those other leaves look mighty fine and dark green. You must of been doing something right all year. Many times citrus will drop leaves, turn color or even get attacked by pests this time of the year. The cold comes into play. A lot less direct over head sunlight like summer and watering has to be pulled back dependent on the temps.. That leaf looks like it just naturally fell off.....Mike When you sprayed with Neem, did you spray under the leaves too? Looks like you did the tops but not the bottom..