Forester
- 6
- 3
Hi guys,
I've got an Auto White Widow going on her third week.
At about 14 days I started to notice the leaves (mostly one, oldest) was getting deep dark green in one spot.
Soon after that, the area turned lime green/yellow. Now, a few days later the area is about the same, but new growth is also affected.
Also a few spots on the first leave, yellowing.
Plant seems to be doing good otherwise, visible new growth every day.
I'm growing under 60W COB LED, Hs40 tent (1.3x1.3f)
Temp: 23
RH: 50
Medium: Organic Soil, 7.5l pot
Watering: Twice every 24/h of a total 0.15 liters.
Ph: 5.5-6.5
Irrigation water PH: 7
I got suggestion that this might be a magnesium deficiency, so...
My soil mix has 154 magnesium /liter soil.
Most plants do well with like 20 - 50 ppm as far as I understood it, but can't seem to get a number of how much cannabis demand. Just that it is a heavy feeder.
Anyone got any numbers there?
That leads me to think that if it is a mag. deficiency, maybe it's caused by a lock-out? Since there should be enough in the soil (or maybe not).
I am thinking of spraying a foliar of Epsom salt to see what that does.
If it's a lock-out, a foliar should get around this giving the plant the nutrients another way than the roots, right?
Also, the typical signs of magnesium deficiency seems to be that the veins stay green, which is not really the case here. Maybe it's something else?
I've got an Auto White Widow going on her third week.
At about 14 days I started to notice the leaves (mostly one, oldest) was getting deep dark green in one spot.
Soon after that, the area turned lime green/yellow. Now, a few days later the area is about the same, but new growth is also affected.
Also a few spots on the first leave, yellowing.
Plant seems to be doing good otherwise, visible new growth every day.
I'm growing under 60W COB LED, Hs40 tent (1.3x1.3f)
Temp: 23
RH: 50
Medium: Organic Soil, 7.5l pot
Watering: Twice every 24/h of a total 0.15 liters.
Ph: 5.5-6.5
Irrigation water PH: 7
I got suggestion that this might be a magnesium deficiency, so...
My soil mix has 154 magnesium /liter soil.
Most plants do well with like 20 - 50 ppm as far as I understood it, but can't seem to get a number of how much cannabis demand. Just that it is a heavy feeder.
Anyone got any numbers there?
That leads me to think that if it is a mag. deficiency, maybe it's caused by a lock-out? Since there should be enough in the soil (or maybe not).
I am thinking of spraying a foliar of Epsom salt to see what that does.
If it's a lock-out, a foliar should get around this giving the plant the nutrients another way than the roots, right?
Also, the typical signs of magnesium deficiency seems to be that the veins stay green, which is not really the case here. Maybe it's something else?
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