Meh farm. 5 compost heaps to the left, manual farms for

left top: Onions - middle top: Pumpkins - right top: 4x lentils / 4x hemp / 4x lentils

left down: carrots - middle down: wheat - right down: 3x lentils / 3x wheat / 3x lentils

yes, You can have up to six farms, I have only five, because zombie farms can't produce all the crops that can be grown. So I have some hand-operated fields and I grow what I need there.
The zombie-farm ones can't improve the seed, so that also needs to be hand-grown.

wait...I'm only counting 5 zombie farms...not 6

Zombie farms are being upgraded permanently.
According to my observations, the number and quality of seeds on a fully upgraded zombie farm does not change.
Better seeds in quality and quantity must be produced by the player in "manual mode".

The fertilizer upgrade for the Zombie Farms are permanent right? So do you get more seeds than you loose at some point or does it stay even? Do you get higher tier of seeds out of the Zombie Farms like you do with planting crops normally? If all the seeds are gold quality and the Zombie field is fertilized; does it then continue to replant and grow because you can't get better seeds out of it than gold, and accidentally end up with less than 24 seeds of the planted quality?

Priceless love it well done i've gave you some points well deserved ;)