"leaves look very low, not threaded like others"

I'm not sure what you mean by this. It's not unusual for mulberry leaves to vary from tree to tree and from one place on the tree to another. Yellowing is not a good sign, depending on the specifics. A picture might help us understand the situation better.

I also wonder how old the tree is. You say it's been inside and grown to 1m tall. Are you planning on planting it outside this year?

Your profile doesn't mention your location, and that's an import factor when it comes to anything gardening-related. Tell us where you are and, if you know, what kind of mulberry you have.

Thank you for your response.

"leaves look very low, not threaded like others" - I mean they look like they are dying and aren't perky like leaves from the middle to the top.

I am planning to plant it outside. It's about 3 months old. I'm waiting for temperature to rise because we have still some periods of snow.

I'm from South-East Europe (more precisely Bosnia-Herzegovina) and the inland has a moderate continental climate with hot summers and cold and snowy winters. Last year we had rain above average in the summer.

I have two types of Mulberry tree: white (morus alba), and black (morus nigra).

I made a couple of pictures of the yellow leaf that I plucked out and couple of pictures of leaves position. you can see on the pictures that other leaves at the bottom are getting a yellow edge. Most yellow leaves I've previously removed.

did it go dormant and lose its leaves this winter.. like it is supposed to???

i WONDER ... if it has a requisite chill requirement ...

if it is supposed to be deciduous ... and you did not allow dormancy .. then it does not surprise me.. that it is losing older leaves ... no plant holds them forever ...

could we have a pic of the whole ...

ken

But it's just three month old, it's way too early for dormancy

it was/is on room temperature near the window/sun light so it was warm enough not to go dormant. I believe it's still very young to have falling leaves as a natural process. It's just 3-4 months old.

Here's the pic of the whole thing.

Does the pot drain on to a saucer? Being waterlogged, even for a short time, can cause the lower leaves to drop. So can a lack of light. The two together and leaf drop is a cerainty.
Has it ever been outside, or did it sprout indoors a few months ago and been inside ever since?
Even for a tough plant, that's going to be tricky getting it used to the outside temps and light after growing inside all winter. Start out in shade and gradually over a week or so get it used to the sun and cooler temperatures.
Mike

Yes, the pot drains on to a saucer. It has never been outside. I just took it out today to get a nice picture and brought it back in.

Thanks and thank you all for the tips. ♥