I dug up first lot of my main crop (King Edward) potatoes today and I had so many small ones (approx. 1/2inch) probably had about 18 normal size. Fertilized the compost and watered them regularly too. Anyone know why they would be so small. Grew them from seed potatoes but let from than one chit on them should I only be leaving one chit on them when planting them? Opinions seem to differ so much.
Any advice would be helpful for next year. I grow mine in tyres built up to four high every time I see the shoots showing put the next tyre on and lots of compost.