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As per the title, rust spots, yellowing and leaves eventually dying low down. I was thinking a typical Cal/Mag deficiency? What do you guys reckon?

Check the pics. What do you guys think?

The age old question.... Too much or too little water? Temps at 72F, humidity at 69%, soil, very light use of nutes, 85% indica. edit: also forgot to add they're 1 week in to flower.

Guys, so upset right now. The details: Sensi Big Bud, Levington multi purpose compost, 30-40% perlite, 600w HPS with a dual spectrum lamp, Temperature under lamp 84 degrees Fahrenheit, Humidity 35%, Constant air flow. They get watered once an evening and they always dry out quick. So as you...

High guys, had 14 seeds in my freezer for about 2 years. Fuck know why I put them in there?! Must of been high. Guess I wanted them to last a while before I could grow again but anyway... tried germinating 2 feminized Cole Trains, but only 1 germinated after about 5 days in warm wet paper...

I dont have a 30x magnifier, and it's abit hard to get to shops over christmas. So I'm going to rely on you guys great knowledge to tell me if I'm ready to harvest or to start flushing for a couple of days. Please tell me what to do! Thanks!

Hey guys, This is my first grow and I don't have a 30x magnifier. I realise this is probably a bit of a lost hope but I've been away from these females for about 6 weeks and I've totally lost track of what day I'm on, I can't remember when I planted or when I switched to 12/12. I'm such an...

Hey guys this is happening on a few of my plants. Please look at the pic. The lowest leafs are turning into like burnt paper. What's causing this?

Hey guys, I heard getting light onto all bud sites is a good idea, so am I okay using this mirror? *Please excuse the poor camera, my 600w HPS makes it get dark lines in the picture.

Hey guys, Why is this happening? It's on every leaf, even the very tips of the newest leafs.

Hey guys, I repotted a few of my feminised White Widows last weekend into bigger pots as they'd become rootbound and just after one week they've gone from being like they were in the second pic (healthy) to like they are in the first pic (not very happy). If you can't tell from the pics, the...

Just wondering how I'm getting on, my first grow, not too sure when I should start using nutes. They smell bloody lovely! Using a 600w HPS. There's a picture of my grow room too. Please comment!

Hey guys, I've been searching through peoples grow journals for the answers to my questions. It's my first grow so it's a massive learning curve for me and any help is really appreciated. The first question is, when you guys refer to how many days your plant has grown, do you count the days...

Hey guys, just thinking logically about CO2 enrichment in a grow room that is ventilated using a 30cm desktop fan. The grow room is not sealed so if I were to use CO2 (yeast and sugar combo) then I'm thinking that the fan would just blow the CO2 away from the plants and the amount of CO2 the...