I just unlocked Druidic Rite and planted 4 mulberry trees with good quality soil/water/table, etc. when I planted them a lot of them had single digits stats. My farming and survival are 20+ am I doing something wrong?
Druidic Rite only affect on chance to get sprout not on purity i guess. I planted a little forest already and i'm almost sure that tree's quality formula is like in legacy haven. You can read about it there http://ringofbrodgar.com/wiki/Tree.
So it's (SOIL*2+WATER*2+POT*3+TABLE*2+SEED*15)/25 +(RNG -5,+5). As you can see seed had a really big impact on tree you'll get and i'm sure you don't have good quality tree's seed yet.