posted 11 years ago
As a rule it is not good to plant them in same spot. Because of 2 reasons: they keep spending the same nutrients, and pests might accumulate.
Here in Iceland I did grow potatoes this year in a bed where 2 years I was growing potatoes: absolutely no problem and a yield even greater than 2 years ago.
Thing is: Iceland winter is so harsh (extreme winds, freezing without snow cover and many thaws) that any pests are eliminated.
Our projects:
in Portugal, sheltered terraces facing eastwards, high water table, uphill original forest of pines, oaks and chestnuts. 2000m2
in Iceland: converted flat lawn, compacted poor soil, cold, windy, humid climate, cold, short summer. 50m2