Quote:
Originally Posted by maf
The size of fabric container required depends on multiple factors including climate, sun exposure, frequency of watering, quality of potting mix, fertigation regime, pruning strategy, cultivar choice and countless other factors.
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I Agree.
Bigger container offers convenience (to grower) so that he/she does not have to attend the plant all the time. If you consistently provide the right amount of moisture and nutrients you can do it in much smaller container. Soil is just a medium for the roots to anchor, draw nutrient and moisture from it.
Climate is a big factor. In a hot and dry climate, a bigger pot can be very beneficial. Whereas in a cool climate it is not as big an issue.
Gardeneer