Started week 4 of flower. Saw these spots on leaves for 1st time today.

By my math you overdosed 6 fold, molder chart tells us bot cal and mag excess will inhibit N uptake, and if you did not ph correct you probably messed up your soil pH as well. Keep us updated if more issues start to to show soon you will have to flush your medium, then re apply your dots and give a proper dose of calmag next dryback
 
By my math you overdosed 6 fold, molder chart tells us bot cal and mag excess will inhibit N uptake, and if you did not ph correct you probably messed up your soil pH as well. Keep us updated if more issues start to to show soon you will have to flush your medium, then re apply your dots and give a proper dose of calmag next dryback
I will try and flush in the morning. If I can keep this thing alive another 2 weeks I should be ok. Instead of dots I may try Dr Earth fertilizer.
 
What other plant needs or uses distilled water ?

If you ran just straight tap water- your calcium and magnesium would gave been covered and ZERO need to “ compensate “ with calmag.

When you try to guess the right ratio of calmag needed to go back in - you may end up chasing your tail.

RTU soils ( ready to use ) out of bag is ready right from bag - for ANY potted plant. It is not specific to cannabis …. For example - soil in container with a houseplant or tomato plant … you just water it right from the tap.
 
I will try and flush in the morning. If I can keep this thing alive another 2 weeks I should be ok. Instead of dots I may try Dr Earth fertilizer.
Don't rush to flush if new issue do not present themselves. You never know you might get lucky and it's generally easier to do to much then to little.
What other plant needs or uses distilled water ?

If you ran just straight tap water- your calcium and magnesium would gave been covered and ZERO need to “ compensate “ with calmag.

When you try to guess the right ratio of calmag needed to go back in - you may end up chasing your tail.

RTU soils ( ready to use ) out of bag is ready right from bag - for ANY potted plant. It is not specific to cannabis …. For example - soil in container with a houseplant or tomato plant … you just water it right from the tap.
Been there done that. Add calmag doesn't fix issue, add more calmag lock out my N add more N fuck up my pH plant stops drinking. At then end of the day would have been better off living with the rust spots , did a lot more harm then good
 
What other plant needs or uses distilled water ?

If you ran just straight tap water- your calcium and magnesium would gave been covered and ZERO need to “ compensate “ with calmag.

When you try to guess the right ratio of calmag needed to go back in - you may end up chasing your tail.

RTU soils ( ready to use ) out of bag is ready right from bag - for ANY potted plant. It is not specific to cannabis …. For example - soil in container with a houseplant or tomato plant … you just water it right from the tap.
I have well water can't use the tap, I use distilled since I started growing but I may just switch to RO water from the store. I don't have an RO system.
 
I have well water can't use the tap, I use distilled since I started growing but I may just switch to RO water from the store. I don't have an RO system.
What's the issue with your well water that makes it unsafe for your plants? Most the time a breta filter will get ya clean enough
 
For what it’s worth you have a light calcium deficiency and perhaps some bleaching from the light on the top leaves.

See how they respond with the calmag you gave them. In my experience it takes a few days for calcium deficiencies to stop so wait it out a little.

As jimski mentioned weeks 4-7 is when they seem to like the most calcium so you gotta be proactive.

Plant looks good though don’t panic :)
 
Uploading some pics since it's been a couple of days since I Cal-Mag blasted this thing lol. I have some Bud Bloom coming in today.
 

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