Pots have their own purity which can be checked by right clicking on them and opening an interface.
Each time the purity of the harvest is greater than the purity of the pot, the pot's purity will increase. It can increase by a maximum of 2% per planting and it cannot decrease.
The number of plants yielded at harvest is a default of 2.
There is a chance to get more the higher your Herbs & Sprouts is:
You get only a Chance! It means that you also get Gardening Pot yields with +0, +1, +2, +3, even if you have a H&S of 250 with a Chance to get +4.
The Yield can be checked the same way as the purity, by right clicking on a pot and opening the interface.
Players may occasionally find that a Virginia Snail or Caterpillar has eaten one of the vegetables in their pots.
Stages of a Garden Pot
Pot after you have added Humus to it