[brokenglass]

Any idea why this is happening, they are well earthed up and have had Blood Fish and Bone, bagged Farmyard manure and Chicken pellets.   They will be getting Comfrey Tea this week onwards.

[Aled]

I've got the same problem brokenglass.
Some of my plants have a bit of yellow. Thanks in advance. 
Cheers
Aled

[JayG]

It's possible that something is having a bit of a nibble at the roots or stems here and there, but as long as the rest of the top growth isn't stunted I wouldn't worry too much about it.

Don't go too far overboard with the feeding in an attempt to green them up - although they are hungry plants you don't want to encourage too much foliage which could be at the expense of tubers.

[Aled]

Thanks for the reply JayG.
Cheers
Aled

[brokenglass]

Thanks, the feeding regime is an attempt to improve impoverished soil!

[peapod]

Some yellow leaves on any plant can be expected.

With spuds feed of course, but always water well too. Ive had good crops where I've been lazy with feeding but always watered well. Dont underestimate that too.