Harvested potaotes tiny

Hi Everyone
 Well after the blight the tops burned,now time to dig!!,1st plant dug small potatoes,2nd one dug same again,we dug 10 plants and i got marbles just enough spuds to cover the bottom of the bucket ,we had them for tea with home grown carrots.
They were very nice, just not enough and to think i was going to buy potato sacks to put my huge harvest in!!!.
Try again next year and put them in alot earlier.Lillileaf

Hi
I have another 10 plants to dig,i expect the same amount ,this year is my 1st year of growing anything so at least i got 1 meal!!!!.Lillileaf

setanta  is a main crop rather than 1st or 2nd earlies. How close were they planted and how deep and did you earth up? Were they chitted first? Have you been watering often as potatoes are very water hungry?

Are you sure you had blight as it has been fairly dry?

Main crop is normally ready in September, so if it was blight (which also affects tomatoes) then that would have killed the plants.
Affected horse manure can also cause problems as well as white onion rot from up to 15 years.