Hello

I live in NYC (so you know the general weather).

Unfortunately I don't know the name of the troubled plant. I've had it for a few weeks now and it's been doing well outside on my balcony, but my landlord had us move it to the roof while the balcony is being repaired, and within a few days the plant has totally changed. I don't know if it's a coincidence or not. I've been watering it pretty much the same amount. It gets roughly the same amount of sun as sun as well (but could be wrong on that).

Any help would be greatly appreciated. Thank you.

Hi MSB_,
Congratulations on joining! You'll love the people and the beauty that is portrayed in their photos.
Lots of hard work and fun!
I do believe that you have a Dahlia. I don't know the variety. If you search around the site, someone will definitely give you your answer.
Good luck and enjoy!!

I think it's dahlia. It likes sunshine and fresh air. Im not sure but, if you think its in good place, i mean the sunshine and the air is okey for it, the problem may insects. Check the red ones. -

Stick your finger in the potting compost, deep and feel how moist or dry the thing is: dahlias don't like having "wet feet" and are extremely prone to root rot, which on pretty much all plants starts manifesting with yellowing, drying and finally dying leaves. Dahlias take very little water, even as potted plants, and if root rot has started there's little that can be done to save the plant.

Now another thing are those tiny white spots on the leaves. They kinda look like the leftovers from a pest feasting, perhaps whiteflies or lacebugs. Any chance you can try wipe them off with a paper towel to see if they come off and how they feel like?

Looks like spider mites.
Also, you will get more reflected heat on the roof so that will add stress on the plant, especially being moved from the previous position.