this is a really interesting thread as i hadn't realised a spike could be due to having a very low amount or already having enough.

I am getting funny effects from it too right now so also need to work it out. I had a second related question to this though. If you normally have a low level of sunlight in your day (ie live in a non sunny country like Scotland ) and then unusually spend a large part of the day outside in blazing sunshine would you reduce the amount of potato that night. I am definitely getting spikes from the potato and not feeling right but I particularly noticed it a couple of nights ago after spending a day outside in sunshine
thanks
Carolyn