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Re: [pfaf] Re: Comfrey (from

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  • matthew@b-and-t-world-seeds.com
    Symphytum x uplandicum (Russian Comfrey) is one of the plants at the root of organic gardening (the Henry Doubleday Research Association was named after the
    Message 1 of 1 , May 27, 2009
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      Symphytum x uplandicum (Russian Comfrey) is one of the plants at the root of organic gardening (the Henry Doubleday Research Association was named after the Quaker pioneer who first introduced Russian Comfrey into Britain in the 1910s) it has an excellent chemical composition for use as mulch, in compost or teas for feeding plants, and will survive a good range of soil conditions.

      While the English “Bocking 14” cultivar is self sterile, Russian Comfrey is a well known, standard, hybrid between Symphytum asperum and Symphytum officinale, so Symphytum x uplandicum seeds are easily available (although not from the cultivars themselves). Obviously there will be some variation in the hybrids produced from different Symphytum asperum and Symphytum officinale parents.

      The Bocking 14 cultivar was developed about 50 years ago at the Henry Doubleday Research Association in Bocking, Essex, UK and has become popular, partly due to being sterile (it could be a nuisance if your mulch or compost starts taking over, right where you were hoping for completely different plants).

      As well as being a stronger accumulator of nutrients (especially Potassium) Russian Comfrey is stronger in pyrrolizidine alkaloids than other Comfries, so may be more toxic too.

      http://b-and-t-world-seeds.com/carth.asp?species=Symphytum%20uplandicum%20x&sref=23239

      All the best,
      Matthew

      Matthew Sleigh
      B and T World Seeds
      Paguignan
      34210 Aigues-Vives
      France
      matthew@...
      http://b-and-t-world-seeds.com/
      fax ++ 33 (0) 4 68 91 30 39


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