Hi all

I have 3 2m rows of early potatoes sowed about 2 weeks apart - sorry can't
remember the variety.
The rows are close (about 18").
All looked healthy until about 4 weeks ago The leaves of the older plants
have yellowed with brown spotting.
I have googled and find it may be iron, potassium, calcium deficiency - not
clear which.
We have dug 2 plants which yielded reasonable size, but low number of
potatoes.

Is there anything I can do at this late stage to recover the
situation/improve the quality or volume of yield?

The youngest row has not yet succumbed.

TIA

Phil