Brown spots & yellowing of leaves moving upwards
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Hello
First of all let me say how useful this site has been. I dunno what I woulda done without it. I got a pretty good yield from my first grow much of which was due to advice i found here.
I'm into week 3 of veg, with 3 plants on the go, growing under a 250w HPS, the strain is Orange Bud, I'm using Vitalink nutes with NPK 10/5/16, I'm growing in normal pots with cellmax/(1cm squares of rockwool), I also top up my nutes with Vita link liquid silicon. I take a ph reading before watering which is usually around 6.2. I water whenever the pots feel light.
I am following the feeding programme provided to me when i purchased the nutes but have noticed some yellowing at the bottom of the plants which is moving upwards and now all 3 of my plants are developing brown spots on the leaves and going crispy in some places. Also I've noticed a big build up of algae on the surface of the rockool.
On my last grow I had one female and 3 weeks into flowering encountered a similar problem, resulting in pretty much most of the fan leaves dropping off the plant. The buds were fine though i Yielded about 2 Oz. Not bad for a first attempt i thought. This time round though the problem has kicked in earlier and so i desperately need help as I'm worried this will affect my Christmas crop.
Can anyone please help me?
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