Hi guys,
This is my first grow; I've made lots of rookie errors along the way but have managed to make to Week 8 relatively unscathed until now...
I've got two 12L pots growing outdoors. First one an "Alpujarrena" seems OK, but it's started getting yellow leaves towards the bottom of the plant.
The second, BCN Critical XXL, has been slightly more temperamental. It had a short bout of powdery mildew that I think is now under control, but over this past week it developed small, dark brown dots on the leaves; and now those leaves are turning yellow/completely necrotising all over the plant.
Photos attached. Three close-ups are the BCN, the other is the healthier Aplujarrena.
I know I'm in a hard water area and this is the info I've managed to get from my supplier:
Calcium carbonate(CaCO3): 280 ppm
Degrees Clarke:20
Degrees German(DH):16
Degrees French:28
I bought an admittedly cheap ph probe, and it seems like my soil (and water supply?) is running too alkaline, fluctuating between ph7 - ph8.
If it's always been that high, I'm confused as to how I managed to get by this far without having issues?? I've got other bits and pieces like veggies and ornamentals, growing fine, but I guess they don't mind higher ph's.
Finally in terms of feed...I made the rookie error of growing both plants in Miracle Gro All Purpose Compost. It's meant to have 6 months worth of slow-release nutrients (annoyingly I don't it doesn't tell your the NPK breakdown) in there so up until now, I haven't fed them with anything else. During the early stages, I definitely noticed some nutrient burn but the week before this all kicked off, everything seems pretty green and healthy.
I've now bought some BioBizz Bloom - and have done two doses this week, along with a small dose of Epsom Salts just in case I've got a Cal/Mag issue.
Any advice hugely appreciated - I'm gutted to have come this far and now things look so bleak!
Shout if you need more images of the bud(lets) etc (they seem fine enough, maybe a bit on the small side).
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