Jimjam1978
Member
About 2 weeks into flowering and notice some discoloration around leaf edges. Running 500ppm GH, bubble bucket, maintaining 6.0 ph. I am thinking it might be potassium deficiency. Thoughts?
Brownish spotting on leaf edges
- Thread starter Jimjam1978
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MellowFarms
Member
That appears to be the start of calcium deficiency.
At pH 6.0, in hydroponics, calcium is no longer available to the plant. I've linked an uptake chart that shows at what pH ranges each mineral is available to the plant:
The leaf edges may continue to curl upwards, you may notice brown spotting, yellowing between veins if it continues. Unfortunately, the physical damage caused by this deficiency is rather rough on the plant.
Some cultivars will experience severe stress in moderate to higher levels of deficiency. If you're not giving them any B1 supplements, you may want to consider giving them a little. Superthrive, or any B1 additive will really help them while you get whatever this is under control.
At pH 6.0, in hydroponics, calcium is no longer available to the plant. I've linked an uptake chart that shows at what pH ranges each mineral is available to the plant:
The leaf edges may continue to curl upwards, you may notice brown spotting, yellowing between veins if it continues. Unfortunately, the physical damage caused by this deficiency is rather rough on the plant.
Some cultivars will experience severe stress in moderate to higher levels of deficiency. If you're not giving them any B1 supplements, you may want to consider giving them a little. Superthrive, or any B1 additive will really help them while you get whatever this is under control.
Last edited:
Jimjam1978
Member
Nice thanks. I bumped up ca and we shall see.