Erowid's Cannibis Vault quote
Erowid Cannabis Vault : Cultivation #10
Germinate seeds in sterile soil (for planting outdoors) or a hydroponic
medium of rockwool or vermiculite. DO NOT (!) use a Jiffy cube #7 to
germinate seeds. Informal tests and experience show these peat cubes do
not work well and stunt the plants growth. (perhaps this peson was doing something wrong like not realizing that PEAT does change PH?)
end quote
This is not to say that I disagreee with VV, I simply wish to present the other side of the coin.