growing potatoes in car tyres

[jennym]

....Potato tubers are just thick bits of root.
Potatoes grow up from the seed sending just a few fine roots downwards. As the shoots head for the surface they send out side roots, it's on these that the tubers form...
Phil

I think potatoes are stem tubers, not root tubers, and also have found that it is important, if growing in this way,  to let the stem grow to about 12", then earth up only to the leaves, then when it's grown another 12", earth up again and so on. The other thing that affects the quantity of tubers produced is potassium - research shows that a equal rate of both potassium and nitrogen gives the best results for large yields.

[jennym]

[terrace max]

But which variety is best?

[terrace max]

Thanks Wardy - really not trying to be awkwardy - but is that shallow or deep containers

[DaveM]

Cross Ply or Radials?

What the best pressure?

.......I'll err get me coat :-X

[terrace max]

Sincere thank you AwkWardy! Sounds like a shallow container job to me...my search for the perfect tyre spud goes on....

[terrace max]

...but isn't that for water lilly pots i.e. on the shallow-side??

Help, I'm boring myself here!

[john_miller]

....Potato tubers are just thick bits of root.
Potatoes grow up from the seed sending just a few fine roots downwards. As the shoots head for the surface they send out side roots, it's on these that the tubers form...
Phil

I think potatoes are stem tubers, not root tubers, and also have found that it is important, if growing in this way,  to let the stem grow to about 12", then earth up only to the leaves, then when it's grown another 12", earth up again and so on. The other thing that affects the quantity of tubers produced is potassium - research shows that a equal rate of both potassium and nitrogen gives the best results for large yields.

Quite correct, Jenny. I'm probably not as familiar with Tiscali as people in the U.K., so I don't know what their reputation is, but here:
http://www.tiscali.co.uk/reference/encyclopaedia/hutchinson/m0007019.html
they give a clear, concise and accurate, definition of a potato tuber. Hopefully succinct enough for everyone to understand.