Rootstocks & Bloom Timing

I recently obtained some peppermint peach tree scions and am wondering if rootstocks play a role in when the tree starts opening it’s flower buds? The peppermint variety is ornamental only and doesnt produce fruit (or when it does it’s not edible, so I’ve read). I live in an area that gets unpredictable frosts sometimes into May. This brings me concern as research I’ve done has indicated this is an early March bloomer. Forigve if this is a novice question as I’m new to all of this. My thought process is if I graft onto a rootstock that is a later bloomer, will the scion follow suit? If not, I think I’ll graft them onto to dwarf rootstocks and keep them potted so I can bring them in should a cold snap move through during blooming.

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