No matter how many times I plant flowers and which sim I do it with, it doesn't count towards my challenge. I deleted everything from the mod folder - that doesn't change anything.
Edit By Crinrict...
Ideas
Just checked, removing the mod makes no difference. The tasks won't complete.
It did help to repair my game. So no mods, repaired game and I was able to complete the planting and week 2. Thanks to both crinrict and luthienrising for their help!