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Tonts-
Hmm. Only ever put spuds into the ground. Neighbour does a whole (stood upright) growbag for one plant (so that’s maybe 50l+ of ‘growing medium’ not dirt)
Sorry can’t be more helpful:( -
Well working on how I sow I put potatoes down in an 18” grid (roughly). If we assume a foot down for the root cluster; then that comes in at 9x9x12” 972 cubic inches or a smidgen under 16 litres au naturel per plant.
Not saying that this maths translates, but the small pot concept could be valid as you are giving your plants about half that volume?
crossedthread
RagnarHairybreeks
Are those pots quite small? Possibly all the effort’s going on overground rather than under?
IANApotatoE