your plants are nearing the end of their life and they are sucking a;ll nutrients from the spots in the plants that really dont matter, they look fine.
and never use MiraclGro, lol.
Been flushed any ideas am going to get some cal-mag today.
I took a bamboo
stake and aerated the pot by poking the stake down to the bottom
of the pot all over, 3 days later presto!!