deeunit1answered grow question 4 years ago Seaweed is great for many issues.I use Algen Extract from House and Garden,its Norwegian Kelp.Its one of the few things where you can see the impact on the plant straight away.I see you've also been told to use Microbes.I also use Biosys from Ecothrive,its an instant Compost Tea,its got Microbes,seaweed,humic acid,amino acid,enzymes and molasses in it.Its more effective if you bubble it with air but it can be added straight to half strength feed.I can't recommend it enough.Iv not had a problem with seedling damping off with root rot or mildew and mold in buds in the 10yrs Iv been using microbes.