SLHLover
Well-Known Member
Using colloidal silver on autos does work but you have to be persistent - spray a week before it’s due to flower and keep spraying for at least 3 weeks. Personally I wouldn’t bother with CS as it very messy and requires daily spraying. It also doesn’t work on every strain. Silver Thiosulphate solution much more effective and requires 3-4 sprays maximum...