The potato jungle

I had some potatoes growing in the pot on the balcony last year, they kind of withered and died over the autumn and there was this empty pot full of dirt sitting on the balcony for months and months.

A few months ago, when the weather became a bit warmer, potatoes suddenly reappeared, to my complete surprise - I did not water what I thought was an empty pot or paid any attention to it, hardy self reliant plants, just for me!

I now have a proper potato jungle on my hands, the big pot starts to look very crowded, i wonder how much bigger will they grow...