I've got 4 types of chilli and one sweet pepper growing indoors under lights in the same medium - a mixture of coir, (sterile) compost and vermiculite, with a pinch of rock dust added. As I'm in Scotland and it gets a bit cold (even indoors!) at night I've had the plants all on a heat mat (with temp probe in the soil), set to switch off at 20C (60F).
The sweet peppers and 3 of the chillies (palivec, numex suave and ancho) are all doing fine - but the Trinidad Perfume ones have had all their new leaves yellowing, though the old leaves look green and healthy - which I've read is a sign of iron deficiency.
I've read that this can be caused by (obviously)! a lack of iron, too high a pH, and too high a temperature. Are Trinidad Perfume chillies more susceptible to soil/nutrient imbalances than others? Is 20C too hot for the soil?
I've turned the heat down a bit to see what difference that makes, but I'm now also wondering if I should take steps to amend the soil for those plants/the whole lot, or if I should just be patient.
Any tips greatly appreciated!
The sweet peppers and 3 of the chillies (palivec, numex suave and ancho) are all doing fine - but the Trinidad Perfume ones have had all their new leaves yellowing, though the old leaves look green and healthy - which I've read is a sign of iron deficiency.
I've read that this can be caused by (obviously)! a lack of iron, too high a pH, and too high a temperature. Are Trinidad Perfume chillies more susceptible to soil/nutrient imbalances than others? Is 20C too hot for the soil?
I've turned the heat down a bit to see what difference that makes, but I'm now also wondering if I should take steps to amend the soil for those plants/the whole lot, or if I should just be patient.
Any tips greatly appreciated!
