Change to Agriculture/Missing Plants?

I may have missed this, but didn't find anything upon search. When using a greenhouse to grow plants, once grown, do the plants expire/die if they are not harvested?

Situation: I had a large planting bed half with garlic and half with onions which no longer has any sprouts/plants and is labeled as unused soil.

 

Mine have never died and my current batch has been unharvested since about Monday so I don't think that's a worry. As far as I know the only down side to not harvesting is loss of the use of the beds/greenhouse for other things. Is it possible someone else harvested for you?

 

Mine haven't died and they have been mature almost 2 months, 32 greenhouses full. (I am sure the immersion police will love this fact)
If no one else could have possibly harvested,use the bug report form.

 

you gave me a morning smile ....

 

"Tomatoes"?