From upgrading your Ayaka to cooking, the Sakura Blooms are often used in Genshin Impact, while not that hard to find you'll still need a lot of them so here's a guide to where you can get your hands on a bunch.
To gather the Sakura bloom you'll need to make sure to use an electro attack first so that it becomes available.
Sakura Bloom Location in Genshin Impact
Your quest for Sakura Bloom shouldn't take that long as they're all located on the same island: the Narukami Island. Once there the obvious farm point is the Narukami shrine as a lot of them are located there but here's an overview of where to get them.
If you're looking for a more precise location for all these Sakura Bloom I'd advice checking the official interactive map where you'll be able to zoon as you see fit.
You can find the map on the Hoyolab website here.