Walls and Ceilings - Attaching window rosette to old plaster wall

I took down a couple of pieces of window trim in a century home to deal with counterweights. On one, the rosette pulled loose from the top trim - it had been toe-nailed into the top and side trims poorly in the past.

I was thinking about using Liquid Nails to reattach the rosette this time, then putty and paint around the edges (whole living room needs a paint job). These are old plaster and lathe walls, and it looks like the counterweight channel extends up behind at least part of the rosette - I'd prefer not to nail directly into the wall because it may be hollow, and because some of the plaster has crumbled. Toe-nailing seems like a pain and problematic.

I hope to never take down the trim again, certainly not the rosette - but is this an okay way to reattach the corner block?

Yes I think gluing is your best option. I wouldn't use liquid nails. It dries too slow. Loctite makes a great glue that will hold tight in 30 seconds.

Coops, sorry for butting in, but is that Powergrab you are referring to? It is outstanding for quick adherance.

Thanks for the recommendation - I'll look at their line next time I'm at Home Depot and read the intended usages - looks like the have a paneling/drywall one and an all-purpose one.