Doubt miracle grow has all 17 eles either. How could you supply those much needed minerals? Black strap molasses has to be unsulphered. Use every time water and you will see improvements. 15 ML black strap molasses unsulphured (grocery store) per gallon of water. Shake really good adjust ph 6.3 and water. You have 3 gallon pot so I would start off with .3 gallons of water per plant per every 3rd day is a good start. Molasses is organic way of feeding plants nutrients and usually contain good amounts of everything
This is likely where it went wrong for you. Flushing soil with slow release nutes releases those nutes in deadly quantities.
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