I have 4 Blue Dream autos. They were all started at the same time, (though 2 are much bigger, don’t know why). Things seemed to be going along well, but this week I noticed some of the leaves of the 2 tall plants have brown/rust colored markings on them. Any ideas what this is?
Fyi, I’m using FoxFarm Ocean Forest soil & FoxFarm Liquid Nutrient Trio Soil Formula: Big Bloom, Grow Big, Tiger Bloom. I only give nutrients 1x week, and only 1/2 of the recommended dosage. (Afraid of too much.)