I have a cure for the decaying epidemic
I think I (Doctor Bob) have found a cure for the decaying epidemic.
It's a disease that affects trees harshly, decaying them quickly before anyone has a chance to fix them, and the tree can't grow higher because of the disease.
Here's my solution!
I tried Portuguese a few months ago (I'm holding off for a while until I get level 25 in Spanish) and my tree contracted the epidemic.
I kept progressing and strengthening until it got out of hand, so I didn't move on. It has since been cured, but it definitely took a while.
Now for the past week I've been doing Norwegian and I realized:
The cure is simple.
Grow your tree a bit every few days. Then take a day or two only strengthening, and if there's nothing to strengthen, use the overall strengthening button on the right side. Only do strengthening.
I've noticed it only affects young trees, so if you do this for the first third or half of the tree (or less) you should be fine for the rest of it, but still be consistent.