I propose changing the wording "Unlock new seeds by harvesting mature plants." This could be incorrectly interpreted as you unlock new seeds by harvesting ANY mature plants. I kept planting and harvesting baker's wheat expecting a new seed to unlock - didn't realize I had to cross-breed them.
Some other players I've talked to agree that this instruction is weirdly-worded.
Saying "Mature plants drop seeds when harvested." would be less confusing.