Posted: 24/01/2015 at 11:51
You can as long as there were no pests and diseases.
Use a special potato fertilizer.Most commercial chemical feeds specific for potatoes are balanced as 2:2:3, that is equal amounts of nitrogen and phosphorus with half as much again of potash. The nitrogen and phosphorus will feed the haulm (foliage) and root system with the potash feeding the tubers themselves. You can always feed extra once the tubers have formed if needed.
Edit: I presume you want to grow potatoes again.