<span class="link_user">@Ph_cubed</span>, I use seaweed/kelp until week5 as a few of the top bud boosters have it in for mid flowering.Advanced Nutrients which is one of only a couple of companies that are designed on cannabis plants.Canna Boost also has it in.Take no notice of people talking about PH.I tell everyone over and over,watch the advice on here.They must of caused some people some serious damage over the years.They talk about soil and organics like its a hydro grow.Iv been experimenting with substrates over the last 5yrs comparing coco with soil and a number of different mixes and the best Iv found which is recommended by trusted inustry insiders is the 3mix.3rd soil,3rd coco and 3rd air substrate meaning clay balls or perlite.I use the clay balls.I foind the Canna Bio soil is the best as that already has 30% coco in it so I just add clay balls.Advanced Nutrients are the best on the market.