Hi all,

Soil or hydro: Soil
plant age: Unknown
pot size: Tiny! Approx 1 litre
has it been repotted? and when?: Yes, ages ago
soil type: Cheap as chips compost / perlite mix
nutes or additives used and how often for soil: Baby bio only throught veg & flower
temps (max min): Unknown
humidity: Unknown
lighting type: 125w blue CFL
ph level: Unknown

Firstly, please accept my apologies for the lack of info on this problem, its not my plant, its a friends. I went round to his last night and was presented with this.

The plant in question is a Nirvana Ice, approx 12 inches high, in a tiny 1l pot (to try and keep size down), been flowering for around 5 - 6 weeks ish... Groom is a cupboard approx 1m3, only intake and extract are a crack where the door doesnt quite close, lol. Its quite a nice looking bushy plant, but a lot of the lower fan leaves haver gone purple to some degree and are now yellowing and dying off. Here's a pic:

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My first guess was cold night time temps, but I've never had this problem before so wasnt sure... Recent growth has been normal green so the purple leaves would coincide with the recent cold spell we had. No idea of actual day / night temps but as the groom is unheated I would guess the night temps get pretty low... Also, I gave my friend a Nirvana Papaya clone a few weeks ago, one of the leaves on this has started to go purple too where mine are all unaffected. It looks like the purple is spreading from the stem of the leaf to the actual fingers of the leaf, but on the Ice plant it looks like the purple is starting in the middle of the leaf and spreading outwards.

Could also be a deficiency but I dont know what, maybe Mg?

I realise it could be quite tricky to diagnose what with a lack of knowledge and far from optimum growing conditions, but any info would be gratefuly received!!

Tks in advance...