I'm not so worry about how hard to find bloom material.
Namely will make some special deal that come along with bloom stuff for sure.
Or maybe he will put it in shop for trading with NG.

The real pain part is player will starving of gold.
Bloom use more money than evol, and with max lv raise to 80 it's mean more money spend for upgrade.
Nutaku don't have free increase gold drop campaign like DMM.
So only you can farm gold in short time is pay and run Morimori as you please.