What went wrong???

Hi there, well If You Check my diaries, I Had similar issues with the First grows. Didn't really affect the harvest so don't panic🤙. My Last grows I Added lawn lime and ground Dolomite. I seemed to have had a Magnesium deficiancy. My Last grows Had No rusty spots. For quick Relief IT is also possible to add Magnesium sulfate ( Epson salt. Have fun growing 🤙

Over fed with nitrogen and spots are due to a calcium deficiency. No need to flush or reduce your fertilizer strength..........and certainly do not use peroxide on soil mixes! Add a cal/mag supplement to your line up or increase the dosage if already using one. Damaged leaves will not recover...........you won't be able to "fix" the problem in the short amount of time before harvest, but you can stop it from getting worse. Otherwise, continue on as planned, your plants will be fine.

Calcium deficiency. No flush works in soil. Peroxide kills all bacterial fauna in it, so its insane advice. What caused it - thats the question. In most cases its wrong ph in. In soil you have to be in 6.3-6.5 ph range . Second most common - heat and wrong watering procedure. Start checking ph, buy calmag ( honestly better even non organic, for faster action, something luke link i will give you ) https://www.ebay.co.uk/itm/285641635859 Dont overdose !!!

Yes first do a complete flush. Add 1 tablespoon of peroxide per gallon and cut nutes to 60% of what u were using Give 10 days they will be back on track!! 😁