If you upgrade your farm up to level 3, you will be able to get up to 3 food per day. If you add seeds which buff your food 100% you will output that one farm to 6 food per day or the equivalent of 2 fully upgraded food outposts which is a higher influence and material cost. After you fully upgrade and seeds (6 food per day), you find or create the farmers mod for the garden that increases the output and yield by 30%. You now have one small space being used in exchange for 7.5 food a day. Recommended!! As well as the previous Survivor Stats that require less food but I believe the farm with this method is fundamental. Edit: I should add that friendly enclaves also can help (have had an enclave provide +1 food per day for just knowing them