Grass/ hay analysis- Dodson&Horrell or Forage Plus?

Hi,

I used Forageplus for my analysis and had the interpretation done independently.
FP only gives you an analysis but will interpret for you at extra cost. If D&H also advise what to supplement in order to balance I would be really interested as at £30-47 thats very good value!
 
I just ordered a Forageplus full mineral analysis as I got the impression (might be wrong) that they test for more minerals than D&H. We shall see.
Out of interest Lancelot, the sampling info says to collect around I think 400gm - can you give me an idea what size envelope is needed to this sort of quantity? I am metrically as well as spatially challenged, I think!!
 
I got sent a sample bag & a postal envelope as part of the "kit". Mine was just a grass analysis so not sure what you get for a hay/haylage test
 
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