h4ppyf4rmer
- 863
- 143
one of my six plants in my RDWC system looks like it's starting to get a magnesium deficiency in my third week of bloom. some of the largest leaves are starting to show spots near the ends.
The reason I believe it's an Mg def is because the pH starts at around 5.8 and by morning it's around 4.6 which makes Mg unavailable according to the charts.
The first problem is trying to figure out why my pH is dropping so drastically over night during lights on time. I'm losing about 1.5 gallons per day of water, so my plants are drinking fine. My EC stays about 1.4 pretty much all the time.
I know it's really common for the pH to drop during bloom but I don't think my last grow dropped quite this much over the course of a day.
The reason I believe it's an Mg def is because the pH starts at around 5.8 and by morning it's around 4.6 which makes Mg unavailable according to the charts.
The first problem is trying to figure out why my pH is dropping so drastically over night during lights on time. I'm losing about 1.5 gallons per day of water, so my plants are drinking fine. My EC stays about 1.4 pretty much all the time.
I know it's really common for the pH to drop during bloom but I don't think my last grow dropped quite this much over the course of a day.