Esmeralda what kind of light bulbs are you using? What is the temperature at the floor level? Drafty?

Maybe try to get the lights a bit closer (6" to 8" from plant) and leave lights on a bit longer? My lights are on about 13 to 14 hours. Also raise the container a bit from the floor. Bringing the tree in until it adjust to the new surrounding it is normal to drop some leafs. I hope the leaf drop will stop soon. From what I can see the tree looks nice and green. How is your watering schedule?

Hi Esmerelda - is this the plant's first winter inside for you?

And, from where are those leaves falling from? The center, side or area where the light is not?

You need at least 12 to 14 hours of sunlight for them to hold their leaves kept that warm...Good luck))

What kind of soil mix and have you noticed the amount of time to have to water again? How long is that mix staying moist?

Hi I it's the 2nd yr. Indoors I have 1 in gritty mix and other 2 are 5-1-1 and I use the water meter to check moisture, and usually water every 10 days or so, as far as the leaves there mostly dropping on 1 tree and lost about 50% no specific area, on it basically all around. The others lose 1-3 a day. I appreciate you all that take a moment to try and help.

NO problem..How long have they been in the house? And how much light were they getting before that outside?

They've been indoors for about 3-4 wks. And outside all day with full sun for about 6-8 hrs I'm guessing

Hey, not to worry then. You have them planted in a great mix, you are watering right, just up your light output with those kind of warm temps and make sure the lights are close, and as Susanne said, it's very common, especially if you just brought them in within the month from those much colder temps and lots of sunlight. Definitely a dramatic change for them and they will shed leaves...But, they will adjust and stop falling off in time, not to worry..I like her advice and good points made..

Mike

With all the light you are giving the tree's foliage, you need to check the temperature of the medium . When a container citrus is dropping leaves, raising the medium's temperature to 70-F many times leaf drop stops. Because the moisture in the container is constantly evaporating, the temperature of the medium may be lower than that of the room's temperature. This cause of leaf drop is especially true if the leaves are dropping from the tree but the leaf petiole remains attached to the branch.

If it is a Meyer, the leaf drop is symptomatic of a significant change in light conditions; it will grow new leaves better suited to the new light. To avoid the leaf drop, you have to move it from full sun to partial sun for 2 weeks and then to full shade another 2 weeks; after that move it indoors and it should maybe only drop a few leaves. Another issue with Meyers is if you let it get too dry and then water it; it will drop all its leaves.

John makes a good point! It is common for such a drastic change..On the side note..The temps in your home are very warm, anything above 60 requires quite a bit of sunlight or artificial added light to maintain such a fine FULL canopy as those trees.....It's obvious by the fullness, the small leaves, and thickness of your tree it got LOTS of direct sun and was very happy before it got abruptly moved to indoors...

Here is a great article from Millet who use to come here and whom has been very helpful and very kind I knew a long time ago..Hope this helps explain WLD better although too it could be a number of other reasons, but in general and often more than not a sudden and 'drastic' environmental change which you have done..

If it is winter leaf drop, these articles will help you understand how it works...

http://tropicalfruitforum.com/index.php?topic=11148.10;wap2

Here is another article too))

http://www.steffenreichel.homepage.t-online.de/Citrus/lime2.pdf