Wow lots of interesting stuff here! I think there are multiple issues here, and, since the health of the plants isn't great, I would deal with all possible problems rather than hunt down one specific one. If it were me I would do the following, since doing them would fix any of the most likely problems that you may be having. I would change the mix to a free draining one. I would check the roots, and pot into a container that is only a little larger than the rootball. I would put them in a partially sunny position after the repot until they get used to their new mix and pot. I would then move to a sunny location once things started to settle. I would make sure the room had plenty of humidity with gravel trays or a humidity. I would make sure the room was warm, and provide bottom heat to the pots if possible. I would inspect for bugs. Mites and scale seem the most prolific - possibly mites in your case. Webbing is a telltale sign, and sometimes hard to spot, but not always present. I would treat with Toni's spray regardless (she can tell you the ingredients, or you can search previous posts.) If you do spot bugs, use Toni's spray or a suitable one for fruiting plants from a garden centre. I would water these (after the repot) only when the new medium was closer to dry than damp. In a new medium you won't have to worry so much over watering - if it is the right medium it is unlikely you will overwater unless you go nuts with it. Fertilize only very lightly until the tree is back to health, then feed with a high nitrogen feed every couple of weeks. Citrus bounce back, but they take time. These are not by any means the be all and end all of things you should do, they are merely what I personally would do :) Danny

WELL...last night someone on name that plant forum indicated that it was called Yellowrocket, which led to finding that it is probably a very close relative of Yellowrocket: Wild Radish. Whis is a very close relative to Wild Mustard :-) The only reason it can't be Yellowrocket is because the stems and leaves have tiny hairs, which indicates it is Wild Radish. However. I have seen pics of Wild Radish now on Google Images that don't look like this plant, and some that show Yellowrocket looking dead-on accurate, save for the leaves. Ha. At any rate, I'm pulling them up...tis' not to be... Thanks so much for your help, timbu and fammsimm. Now I am also familiar with two other kinds of weeds, so if I spot them, I'll know right away :-) Joanna

Hey "tyrlich" I think you are right. I am fairly certain it IS virginia buttonweed. Now I need to try to figure out how to kill it without killing the St Augustine. And thankyou "chazparas" for your hypothesis. however, this is not the fabled money weed. good looking out fritomd

It must have come from a bird , have never seen this weed in a garden, or bed of any kind, so assume it is a ditch weed, growing somewhere out in the country side, in a ditch.