problems deficiency

4 weeks veg from seed on Friday, soil, using floraflex, temps 75.6 average, rh 73.5%, growing under a single 650w led located 42" away dimmed to 50%. Tap water .01ec, mix cal mag to .3-.4 ec which i now just noticed is 4-0-0, floralex 2g v1 and v2 per gallon ec ends at 1.6-1.8, i than adjust my...

My plant are at their 6st week of flowering and its been a week since those kind of deficency appere what can i do? I been using miracle grow for soil and fox farm for nutriments feeding them twice a week . And my last plant what just star flowering turn...

Hello fellow farmers, Today is day 56 of my Moby Dick XXL Autoflowering and buds are looking nice but these brown leaves and spots are really worring me... I haven't found them in older leaves, only in the new ones... Thats why I believe these could be a Manganese...

My plant is about 3 weeks into flowering and is showing great pistil and trichome production. Last night I noticed some sort of deficiency on a few leaves on the lower half of the plant. Can someone I.D. this deficiency and how to go about fixing it? Light cycle is 12/12 Lights: Feit electric...