More Ambiguity?
The obvious intent of Plant a Seed Day is to get you outside after Memorial Day for the purpose of planting plants like flowers or veggies.
If you've already been out planting earlier this year, that's fine - just plant at least one more seed today. I'm sure you can find room somewhere.
It is not the intent of this special day to have you going around planting virtual seeds like ideas and such.
Ideas can be bad things. They can lead to full-blown thoughts which can lead to actions. And we all know what actions can lead to.
More actions.
Just go read Moving Pictures by Terry Pratchett to see how powerful ideas can be. You end up with things like Holy Wood.
I know, right?