I've recently made 3 additions to my collection and all are making me wonder about re-potting for different reasons.

The first is a small Eustis Limequat that I got 6 days ago that's about 10 inches high and in a 6 inch pot (1 litre?) The soil mixture looks right and the top of the soil was very dry when I got it. There are a few small roots coming out the bottom of the pot and I left watering until yesterday as the soil at the bottom of the pot was still a bit damp. Until yesterday I put it in the greenhouse to try and get the soil to dry out a bit more. When I moved it outside yesterday it dropped a couple of leaves, so I'm not sure if this is just stress, too small a pot or could be as ventilation hasn't been as good as it perhaps should have been (due to the other plants I'm trying to grow in the greenhouse) What's the best thing to do? And should it be re-potted.

The second is a 12 - 16 inch Kumquat that's in approx an 8 inch pot. Looks healthy and has quite a lot of fruit on it. The thing that's making me wonder about re-potting is that there is some moss growing at the top, may be from being kept too damp or too close to a lot of other Kumquats at the place where I bought it (3 weeks ago)

I'm not sure what the third is. At first I thought it might be some sort of minature Clementine, but having tasted some of the fruit it could be some type of Orange (will post pictures soon). But it's about 10 - 12 inches, it's in a terracotta pot about 6 inches max across but the pot is a good 12 inches deep. The soil is really bark. I just think that because the pot is so deep for the size of the tree it's going to very difficult for it to dry and would cause root damage. Perhaps a wider and more shallow pot would be better. Also bought this one 3 weeks ago.

Please let me know what I should do with these and should I re-pot all of them.

I think it was Millet who was talking about pot shape-
shallow wide pots actually stay more wet, tall pots drain better. Ive had some herbs in a bowl type pot and theyve gotten soupy

you still dont want to water either type of pot too often, inside, i was only watering my 3gal kumquat every week or more in the winter.

I have no idea about the other questions- if the plants were in the shade first, theyre probably a bit stressed. if your greenhouse is hotter than where they were, theyre probably stressed.

good luck!