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First time spraying horticultural oils - help me out :)

So I think know what to do to prep my roses that aren't new, as far as pruning and what not. This is how I typically prune roses I have had, like Icebergs and Chrysler Imperial:

The one on the right started to defoliate so I just finished the job for him. The one on the left didn't so I just pruned him without defoliating. I figure these are both ok to spray with horticultural oil... right? Help me out if I'm wrong because I have no idea what I'm doing most of the time and I just wing it.

Now this one is newer, arrived from Antique Rose Emporium in the early fall. Archduke Charles. I have 7 and this is the first time I have let them bud. Usually I wouldn't prune these now... but I have just learned I'm supposed to only prune in January in my county to control pests. So I should prune the adorable little buds, then apply horticultural oil.... right?

Or can I leave him as he is and apply horticultural oil to the buds too?

Also... do I need to be careful not to spray the seedlings sprouting up near the roses, or will it be ok/good for seedlings too?

Thank you so much!

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