Most plant-type blocks can be placed while aiming at the side of a block, given that the area below the side of said block is suitable for planting. This is not true for crops, which can only be planted by looking directly at the top of the farmland.
Linked issues
relates to 5
MC-136405
Lily pads and frogspawn cannot be placed when not aiming at water
Open
MC-145916
Food that can be planted cannot be eaten while targeting a block
Resolved
MC-140651
Sweet berry bush cannot be planted when aiming at the side or bottom of a block
Resolved
MC-70057
Can't place redstone on sea lantern
Resolved
MCPE-82691
Crops can’t be planted by aiming at the side or bottom of a block
Open
Attachments
Comments 4
Relates to MC-93281
This bug is still in bedrock edition. MCPE-82691
May relate to MC-70057