Thanks for that.. I will do exactly that. I have just got in from work and there is only one more leaf that's showing the signs of a cal mag Def. I think it is a cal mag def anyway.. I'm wrong more times than I'm right.
Like I said before I'm a useless plant doctor
I've never had this issue before. I've had hungry plants that were yellow, but none with rusty leaves..
I've always used this same compost and mineral water also.
Hopefully a good feed will sort her out. But
@Growings has me thinking about the soil pH.
Thing is, I don't check the pH when im just watering alone, as it's bottled water and it says it's 6.7 pH on the bottle. I remember that the bottle i watered her with was open for a few weeks. I had put it down behind a box and forgot about. Is it possible for the pH to change over time; due to the mineral content in it?
I will do a slurry test just to make sure. But also give her the first meal. The others are a really healthy green and happy, so I will leave them for now..
Thank you again for your input mate. Appreciate it