I grow veggies and things in a traditional garden, several raised beds, and in several barrels which I keep on my deck. Since energy_wave mentioned growing in buckets I figured I'd post since buckets are similar to barrels. In a previous thread I posted a picture of my barrels with onions growing in them, link below post # 77. I just harvested 25 onions from 2 of the barrels this morning. Since I'm in georgia I grow a short day onion, one of the texas grando varieties. The soil in the barrels is a mixture of 1 year old composted wood chips and the cheapest top soil that homedepot sells. Onions are heavy feeders so they get a handful of 10-10-10 every other week.
The problem I have with onions is storage. Texas grando's only store for a couple of months so it limits how many I can grow and use before they go bad. Thus I also grow a yellow sweet onion which is intermediate day variety which will ripen about a month or 2 later then the texas grandos and thus store and provide me with onions later into the year. But since my area is outside of the intermediate day onion variety zone I don't get the nice big bulbs I get from the short day varieties. They grow more like leeks or big green onions. Still good to eat though.
Potatos I started growing in raised beds a couple of years go. Below is a picture of one of the 2 potato beds I grow. This is a new bed added this year and has half sweet potato and the other half a russet type potato. Again since this is a newer bed the soil is nothing but 1 year old composted wood chips and the cheap homedepot top soil.
The trick to growing in buckets, barrels or raised beds it to keep the plants watered and fertilized as the less soil there is the faster it dries out and the faster it loses its nukes. In my barrels I replace the soil every year while in the raised beds I add to the existing soil and I also grow a bush bean on a rotation schedule as I have always heard that beans help improve the soil. So for today I have 2 raised beds currently growing bush beans and next year 2 other beds will have beans grown in them. I now with this newer bed have 6 raised beds in total so they will get beans every 3'rd year
I won't say that you can feed yourself growing in bucket, barrels or raised beds but you can make a dent in what you eat.
tbd
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Link to barrel pictures in another thread
FOOD - Food Shortages | What You Can Do Before It’s Too Late