I can’t exactly answer your question. Can say thou that when I purchase a rose that is in rough shape or has a few problems I usually cut off the blooms. Yo u can also let it have some shade in the hottest part of the day. Try to resist spraying it with anything while it recovers. The bud drop could be as simple as having gone to long without water at the nursery. Let’s us know how the rose does after a while in your care.

I wouldn't feed it either, just regular watering & shade like Patty said.

It is definitely getting shade during the hottest time of the day, so check on that.

How come its no good to spray it with anything, i sprayed this rose and my others with soapy water the other day, no good?

I gave all my roses liquid fertilizing but that seems to be wrong too, so wont do that again. Not that i think thats to blame for the yellow buds...

Stressed roses should not be fertilized or sprayed....Only water until they recover....Best wishes!

Alright I´ll leave it alone thou something is eating it a bit. But was it right of me to `cut those tiny tiny yellow buds off? I cut as little as possible. Or shall i cut off some more, like 1 or 2 leaves for better shape or something? I have no idea how roses grow when pruned.

Yes it does seem odd but some sprays can be hard on plants. That’s why it is reccomend to let the plant recover. Liquid fertilizer is find for your roses. Just not if it is stressed at the time. Best to let the rose rest and recover. Before encouraging growth with the fertilizer.