I pruned one of mine hard because of blackspot at the end of April, and the bush is full of new red leaves, along with buds, which will open shortly. It has been less than a month, so hers may come back even sooner. I'm sure the weather is a factor, too. I'm a bit southwest of your friend, so it's a little cooler and damper here (hence the blackspot).

Here is a link that might be useful: What's Growing On?

The usual rule of thumb is 42 days. Of course, it depends on the rose. Some roses repeat faster and others repeat slower, but this can give you a time frame.

Smiles,
Lyn

Thank you so very much for the great info lgteacher, Lynn and Kim. I will surely pass along this information to my friend.

Kim - in another thread you had given the most valuable information on grafting that I actually didn't mind seeing the indestructible Dr. Huey growing where I had removed 11 rose bushes.

Kasie

Wonderful Kassie, thank you, and, you're welcome! Kim

In Georgia, about 6 weeks.

It may depend on the rose variety and the conditions, but in my recent experience, it took about a month.

I have a potted Sheila's Rose that I had not prune in at least a year. The new growth from late winter was weak and stunted. It hadn't produced any flowers since last year and that's just pitiful considering newer hybrid roses are rarely out of bloom here in So. Calif. So I gave it a pruning (to root them via the burrito method). It was severely pruned in late April and now has a lot of very lush new growth with many buds. This one opened earlier this week.
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I wish I had a before pic to show how terrible it looked before.