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Author Topic: Magnesium deficiency in potatoes  (Read 3004 times)

suziequeue

  • Joined Feb 2010
    • Llanidloes; Powys
Magnesium deficiency in potatoes
« on: July 07, 2011, 08:29:37 pm »
Our potatoes have got small black spots in their leaves.

Dr Hessayon's book suggests it's magnesium deficiency and suggests a trace element spray and feeding with a fertilizer that contains magnesium as well as nitrogen, phosphates and potash.

Can anybody recommend an over the counter spray and a suitable fertilizer?

Or anybody with any alternative diagnoses?
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Plantoid

  • Joined May 2011
    • Yorkshireman on a hill in wet South Wales
Re: Magnesium deficiency in potatoes
« Reply #1 on: July 08, 2011, 10:44:48 pm »
Buy a box of crystalized magnesiun sulphate based feed  .....Mr Bowers range I seem to think then feed the ground & water it in .
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