I agree with Ignatius and Blackheifer. Thorn Whip is great fun when it works, either to drag an enemy off a ledge or just into melee range, and it’s also handy as a ranged cantrip that nevertheless isn’t disadvantaged by use in melee range. But given the short range, the occasions where you can pull anyone off a high enough ledge to do serious fall damage are rare, Produce Flame is better as a ranged cantrip (unnecessarily fiddly UI aside), most Land Druids, especially, are going to want Shillelagh, and Guidance is more generally useful (at least unless you have another character like SH who can cast it or the amulet available in EA).
I had Thorn Whip and Produce Flame cantrips for my Moon Druid, as Shillelagh was more or less useless given her rubbish close-range survivability outside Wildshape and I’d got bored in other playthroughs of spamming Guidance, and a few times managed to drag an enemy into melee range using Thorn Whip then use wildshape, or got stuck in human form within melee range and it was worth using it to finish off an enemy rather than disengaging. I enjoyed having the cantrip for those occasions, and would definitely pick those options again for my Moon Druid run in full release, but I can’t imagine it being worth dipping into Druid specifically to get, so you’d need to be a class that would get additional benefits from Druid multiclass. I don’t know enough about 5e multiclassing to know if there might be something that would work. You would need decent wisdom to avoid missing too much …
