middle of 4th week of flower and I noticed some spotting and lime green leaves. I've read several posts and want second opinions. I believe its a combination of my lights being too close and mg def and n def.. I did a 90% water change added 10% more Epsom salt. Ec 1.8 phd to 6.1 water temps 65-68 room temps 78-80 lights on mid 60s lights off
1st grow in rdwc red spots
- Thread starter Rdot03
- Start date
Logan Burke
Well-Known Member
I doubt that your problem is Mg, or at least not directly. Mg tends to work it's way from your lower, least used fan leaves upwards, taking the actively growing leaves last and creating intervenial yellowing as opposed to an equally light color across the entire leaf. With rust on leaves that are directly surrounding the newly growing buds, I'm guessing that the issue is calcium. While the topic is subject to vigorous debate, I find that myself and many others require an addition of CalMag when using RO water. This factor is complicated by the fact that different strains eat more and less of calcium and/or magensium. This past grow for me, I battled some severe calcium deficiency and found that actually lowering the PH to 5.7-5.8, with my regular dose of 1ml/gal CaliMagic seemed to resolve the issue. I had always been told that calcium is best absorbed above 6.0, but dropping my ph from 6.1+ to 5.6-5.8 drastically and almost totally removed the spread of the rusty and brown blotches that were devouring my mid and upper leaves. What strain are ya running? With the current pandemic happening, if you simply cannot access calmag (I recommend CaliMagic, it only has 1% N with a hefty dose of Ca and Mg) then you can try increasing your base nutrient as it should contain Ca and Mg both. If I were you, I'd do this in combination with reducing the PH. If you can get calmag that'd be awesome, just remember to start low because with you being in bloom it is VERY easy to get a build up of N even using only 1/2 the bottle's instructed dose!
*EDIT* You catching this problem so early will really save you and your babies a lot of grief! This is a perfect example of how important it is for growers to always be inspecting their plant's leaves!
*EDIT* You catching this problem so early will really save you and your babies a lot of grief! This is a perfect example of how important it is for growers to always be inspecting their plant's leaves!
polishpollack
Well-Known Member
always take pics in white light and describe the spotting best you can. clear close ups of spotting will help.
The pictures aren't clear?
I'm using led's I raised the lights a foot so we will see in a few days if that was the cause.
polishpollack
Well-Known Member
We can't see color accurately if you take pics in colored lighting. Needs to be white light. also need you to describe the grow better if possible, like what fert you use, etc.