API/Modloader
Forge

Describe the bug
Petal blocks and the pollen block are not considered solid blocks. This affects various technical behaviours such as redstone conductivity, mobs suffocating, etc. that are listed on the Minecraft wiki.

To Reproduce

• Reproduce the redstone contraption in the image below with any/all of the petal blocks and/or the pollen block. The dust will never turn on.

Expected behavior
Because these blocks look completely opaque, consider making them solid blocks. The one exception you may consider is the pollen block, as fully opaque light-producing blocks in vanilla Minecraft are inconsistent: some, like glowstone, are non-solid, while others, like the shroomlight, are.

Screenshots/Videos