Minecraft wiki entry for Data_variants, associated text: In 14w17a, almost certainly due to changes in how blocks render with them being changed to use block models rather than hardcoded models, these odd pot variants simply rendered as empty pots with no further interesting quirks, aside from the fact that their "invalid" contents could be retrieved from the pot via breaking or later right clicking it. They were completely removed in 17w47a, which split the flower pot block up into an individual block ID per potted object and scrapped the tile entity.