What is your zone and temps? Mulberries are hardy plants. So, unless there is a fatal disease, I doubt there will be a problem. did you plant it in the ground yet? Did you slowly transition the plant from the pot to full sun exposure in ground (assuming you planted in ground). That pot shown in the first picture is a starter pot. Neem oil should be diluted appropriately for use and should not be applied prior to bright sun exposure (I usually do it late afternoon or on an overcast day). The leaves in the last picture look too shiny for mulberry leaves. My guess is there may be a bit too much concentration in the application. Also - too much water kills more plants than anything else. If it's in ground and check how well your soil drains. If it's still in a pot, definitely check the moisture... a wood dowel pushed down and see where the "wet" dirt starts...or stick your finger in and do the feel test a few inches.

Steven, don't buy your plants from Amazon......try a mail order business that actually grows plants.

Tiny pot is way too small, trunk of tree remarkably slender - as though it was grown in a heavily shaded situation. The big flabby leaves would also suggest this latter. And something happened to cause it to die back and start over even before it starting having problems at your place. Problems that might be due to a sudden change in exposure or temperatures, that is affecting it because of the (shady greenhouse?) growing environment it came out of vs. the one it is in now.

Amazon doesn’t sell plants. That is likely from a third party vendor who has an amazon store and grows their own plants. Agree neem oil should not have been applied you can kill a plant with kindness just like you can kill one with neglect .

Looks a little fungal? I can't believe you just left it in that little shipping container for over 2 weeks now, though! You should always immediately plant shipped plants into the ground (or at least repot them into bigger containers) as soon as you receive them! It's very stressful to be constrained in those tiny containers, and much harder to maintain the right amount of moisture in the soil when there is so little...

I would replant it immediately and then give it some time to recover if it can!

Not completely sold on #2 floral but aww heck, you're right about that too. lol :^)

I have too many Mulberry's. I consider them a pest but the berries do taste good. They pop all over my yard and are pretty hard to kill. Stick it in the ground and see what happens.

melike, of course Amazon doesn't grow plants. I meant that purchasing plants through Amazon is very chancy.

The invasive mulberry is white mulberry, bernbecca. We don't know what sort of mulberry the OP bought. Let's hope it's red mulberry or a named fruit tree. But chances seem low given its condition.

eta I missed the word 'red'. So it's supposedly not the invasive one.

OP said it was a Red Mulberry, so it would be a great addition to any yard (if it is indeed one).

The leaves are shiny, so I have doubts that it's actually red mulberry.

" The leaves are shiny "

Dripping with neem oil. ?

Red mulberry may not be invasive but it can be quite weedy. And messy if a fruiting form. So not necessarily welcome in every garden :-)

I have a giant mullberry tree with many many saplings.

I would love to ship you a couple. Maybe we could trade something?

Thanks for the advice everyone. Yeah, I guess I couldn't figure out the directions on the back of the Neem oil, it didn't say to dilute it for some reason. I definitely should have checked online first.

I did plant it in a much larger (about 5+ gallon) pot the day I got it, and put it out in the yard.

At the very least, I contacted the seller about the plant's condition and they give me some advice as well, and said there's a 1-year warranty where they'll replace it if it dies. So hopefully it survives, but I'm not as worried now. Thanks for the help.