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Does This Look Like Magnesium Deficiency?


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#1
rickblaine

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I've got two or three weeks of flowering left; this problem started about a week ago. I just put some epsom salts into the nutes, assuming that it's a magnesium deficiency but I'm not altogether sure that's what I have. Any ideas?

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#2
SmknVTEC

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#3
rickblaine

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This is an indoor closet grow in soil (Fox Farm Ocean Breeze) in 3 gallon pots. I've got four plants going under a 400 Watt HSP light. The strain is Millenium Bud from Dr. Greenthumb. I'm well into flowering, probably two to three weeks away from harvest. Shortly after I posted, I checked the distance from the top of the plants to the light and they had crept up more than I realized. They were at about 10 inches but I've backed them off now to 18+ inches.

As far as I can tell, there are no bugs.

Right now, I'm using Botanicare Pure Blend Pro (a little less than a tablespoon per half gallon of water) and am feeding every two to three days. Last week, I started adding a teaspoon of blackstrap molassed to the mix, as well.

#4
Guest_Norma Stits_*

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what's the runoff PH on your soil?

#5
lessismore

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Have you flushed? To me it looks like a mag def. but I think it may be caused from root lock out. Are you adjusting the PH of the water? Also, feeding them every 2 or 3 days is way too much especially in 3 gl pots. I am almost positive it is root lock caused from a combination of salt build up in the soil, poor PH, and over feeding. Flush them w/ water balanced to 6.0-6.5 PH using 3 gallons water to every gl of soil, so in your case 9 gls of water. Let the soil dry a few days, then give them a shot of molasses and use pure water the last few weeks of flowering. I think you will be fine.

less

#6
rickblaine

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Makes a lot of sense. I'll give it a try. Thank you.

#7
rickblaine

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Well, I flushed them this afternoon. I'll keep you posted.

#8
rickblaine

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Do I understand that molasses is not good during the last couple of weeks? (I'm pretty sure that I'm a couple of weeks away. If you're so inclined, take a look here and let me know what you think: http://forum.grassci...tml#post3411758.)


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