Originally Posted by Roentgen

As the blooms are 5* items, I just expected it to have worse drop rates than the other rewards (3* girls/manyus, 1* coins/seeds), so I just single roll whenever I have EC. Don't do the 10 roll. You'll never know when you actually get the special item(s) with a single roll; if you do, you can use any spare EC on the next round.

I'd say mine's been generally good to me, except Round 5. Currently at 6/7. Took me no more than 5 single draws to get the blooms in Rounds 2 and 4. Probably more of bad luck on your side, if anything.

reset 5/7 is currently also being cruel to my low level semi-newbie butt. 45 pulls and no skillbloom. only 5 to go. Up until 5/7 the most I had to do was 22 on reset 3/7. Which I've been thankful for since all I've really been able to grind is e-2 with the occasional e-3 when I had a 40k+ rainbow helper pop up on the list.