Is it sitting in a drip pan to stop water from getting on the floor? Wilting sounds like too much water which results in root rot. If it is sitting in water or is too wet, let it dry and then lightly water with a tablespoon of chlorine bleach in the water to kill the root rot. What kind of soil is it in? Is the soil too wet or does it dry out too quickly? If it is in a vermiculite soil, it may be drying too quickly. Add a few drops of liquid dishwashing soap to the water to help the soil hold and retain water. Can you move it near a window for more light? That would help. Zone 5 must be rough to grow citrus.

I have it under some plant lights (it gets between 5-10 hours a day plus some natural filtered light), and it had some mealybugs which may have made a comeback. Now all the leaves are drying up and falling off. We watered it once a week so I am wondering if it wasn't enough water. It has probably lost about half it's leaves.

:( My other citrus plants are totally fine, so I am a little discouraged by this.

you should read the Root Rot thread...

Mr Streen...Do I hear/or see, Mealybug???
First, isolate your new citrus from other plants..Second, inspect neighboring plants..Mealy are little horrors..they'll suck the sap out of a plant, which may or may not be the reason your tree has lost leaves..
Since your other plants are doing well, I'd bet your new orange arrived with these pests..
You said you rid them, but didn't mention what you used. May I ask how you 'offed' them? The problem is, those spawns of hell breed bearing tiny demons that's nearly impossible to see by the naked eye..(at first) I hope you found a way to kill both adults and eggs...if you used an insecticide, how many applications were used? Sometimes with mealy, two or three may be needed..

Soil: How much light/sun? is your citrus getting? If little, then little water is needed..in fact, watering should only be done when soil is dry..moreso in winter. If the air is dry and stuffy, and soil wet, it's the perfect breeding ground for pests..I may sound hung-up on these bugs, but I've seen the destruction they've caused, what they do to a plant.

For the time being, other than watering when soil is dry, inspect your orange daily..check everywhere..under and in-between leaves, stems, and soil.
Read label of insecticide in case more than one application is required. (if you haven't done so already.)

Weeping can also be caused by over and underwatering.
I wish you the best...Keep us posted, please. Toni

Hi mrstreenall,

How long have you had the plant?
How large is the pot? How tall is the plant?
How much water are you giving it when you water? Do you leave the pot sitting in water?

Did you visually inspect the roots?

Why do you think that you may be under watering it? Does the pot feel light (or heavy)? When you water does the water run through quickly?
What does the potting mix feel like before you water?

If the pot feels light and the water runs through quickly then you are under watering. To fix that get a large bucket, stick your plant in it and fill the bucket full of water all the way to the top. Let the plant sit in there for 1/2 an hour.

After that remove it from the bucket, get some fresh water and run it through to flush the soil in case there are built up salts in the container. Make sure that no water is left in the saucer and let it rest.

If you find that the plant has root rot, then do as tsmith advised and add 1 tablespoon bleach to 1 gallon of water and flush it with the entire gallon. After that add some hydrogen peroxide to some water (not sure of the amounts) and also flush. The peroxide is supposed to oxygenate the soil and it is also anti bacterial. Then let plant rest.

GREAT ADVICE!!!!!!!!! All of you have really givin this member a chance to survive the poor sic plant!

I like the part the most that was said..."Did you visually inspect the roots?" I found out that there are actually mealy bugs that forage off roots of plants too!!!
Stupid pests!!! I am hung up on them too. I have been fighting them all winter, even in a humid enviroment with moving fresh air!
Toni , I hear your resentment towards towards demons too. I think next to watering issues, these buggers are the second worst killers of my plants too..LOl...Actually..:-(

Take Care
Mike

Just today I found that my limequat has root rot. Since I gave advice that I've never tried before, I decided to try it for myself. I flushed the soil with bleach water followed by hydrogen peroxide and water flush. Then I unpotted the plant and removed all the dirt and pulled off the mushy roots.

After that I soaked the roots in water with peroxide added.
The only potting material that was in my house was fine bark and promix (which I hate), so I mixed them together and repotted into a clay pot.

What I would do next time will probably be a little different. I will skip the bleach water flush and peroxide flush and go straight to repotting.

Hey Mike..what do (root mealy) look like? I've never seen one, (I hope, lol) and can't find a picture of these beasts...are they as bad as mealy that dine on leaves? Also, do they nibble roots? Thanks, so much..Toni

Hi Tony,
Ground Mealybug (Rhizoecus falcifer): This mealybug is smaller than average, lacks the wax rods and filaments, and is uniformly covered with white waxy powder; it feeds on terminal or outer roots of plants.
Tony, type this name into google, and look at the images. They are gross looking. I hope I never get these in my plants!!!:-(
http://www.forestryimages.org/search/action.cfm?Start=1&q=mealybug&results=364
Nibble, not sure..LOlolol
But eat...oh yah!!!
Take care my citrus friend,
Mike

I am so glad I read this thread!!! Thank You! I dream of having the knowledge that some of you have!!!! (What good books/ sources of information can I read???)
Jen