While planting a Briar Seed or a Mint Leaf Seed, on an Hanging Pot, I get the "Blocked" warning.
I had some Buddy Buds already planted on an old save, and those didn't seem to have problems.
Some Briar Seeds on that old save didn't have problems until they got to cold, even after warming them the blocked debuff appeared.
The plants appear to still give of the decor bonus with the debuff.
Step 1: Build a pot Step 2: Plant the seed Step 3: Debuff appears, decor overlay still shows the plant