The Light Mix will also be a suitable soil for the germination of your marijuana seeds since the seedlings do not need high levels of nutrients.
Characteristics of Plagron's Light Mix land:
Composition: Blonde peat, black peat, fibrous peat, perlite.
PH: 5.5 to 6.9.
EC: 0.8 to 1.2.
Mineral nutrients NPK 12/14/24: 1,5 Kg / M3.
Dry matter: 34%.
Organic matter: 80%.
Water retention: 4 ml / g.