Next to last growth stage of wheat looks too similar to its mature stage

Not sure if this qualifies as a bug, but I don't know how else to describe this issue within the submission form's parameters. I strongly feel that the new textures for wheat make the second to last stage of its growth (age 6) look too much like it's ready to harvest, which fooled me into harvesting some wheat prematurely. There are some subtle differences in the textures, but that's the problem: they're subtle.