cal mag phospurus defficiency rust spots

Hey AFN Family, I haven't made a post since 2013 I think. So it's good to be back! Here's the situation, I haven't grown indoors in ages and decided to start again. When the autos hit flower they start to get rust spots on the leaves that slowly crawl from the bottom up. I've spent hours...

found this morning that one of my leaves look like this,, am i looking at a cal prob?

I'm at day 55 auto ultimate Dutch passion. 13ltr pots, all mix soil by bio bizz, nutes = Bio bizz nutes Grow, Bloom, Top max, Cal/Mag I've had a cal/mag deficiency for a week or two, it's got worse the last few days, even after feeding, last feed was 4 days ago, two litres of water 1.6ml...

Hi guys, This is my first grow; I've made lots of rookie errors along the way but have managed to make to Week 8 relatively unscathed until now. I've got two 12L pots growing outdoors. First one an "Alpujarrena" seems remarkably robust, with no real issues to date. The second, BCN Critical...

What is causing this on my Zkettles Berry Blast. Ph or nutrient deficiency? Last week I awoke and found one of my babies not doing too well. Brown spots developed overnight. Then again days later on a new set of leaves. – tap water pH at 6 – water when dry a couple inches – Spider Farm SF-2000...

 I'm am a complete newbie with some basic knowledge. Strain auto ultimate by Dutch passion The problem my babies are 13 days old and the leaves have some spots of what looks like rust and the leaves are twisting and instead of the spikes they are more rounded. Not sure if this is a...