I can see where self-watering could be a life-saver if you can't water the garden on a regular schedule. But I prefer top-watering (though it does have its challenges) because it follows nature's general pattern more closely. As the water descends through the soil, it takes with it organic matter from the top – animal waste, decaying plant matter, etc. It also etches minerals from the rocks, and brings it all down to the roots. The plant, in turn, brings all this goodness back up to the surface, eventually to be deposited as leaves, seeds, fruit and stems. So there's a vertical ecosystem going on that I don’t see other systems, such as self-watering or hydroponics, offering.
Interesting. Thanks brother. The one draw back to overhead watering is fungus can grow and lead to blight and other disease. The plant will get overhead watered anyway when it rains, but the self watering container ovoids excessive overhead watering with a garden hose and doesn't allow the plant to go through the stress of drought which can stunt the plant and fruit yielding, and with container gardening you would want to use a good potting mix with plant food already added but they will get overhead watering when it rains
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