Possible magnesium def
- Thread starter drcoop69
- Start date
polishpollack
Well-Known Member
one half teaspoon in a gallon of water, dissolve it completely and give as a normal watering. you really should put up pics to show what it is however. magnesium def is a very common misdiagnosis in online forums.
polishpollack
Well-Known Member
That's not correct, ANC. Adding it to the substrate won't have a bad effect, provided the problem is mag def. if anything, spraying the leaves directly will have a bad effect much more quickly.
coreywebster
Well-Known Member
Depends on the situation, if its a mag def due to lockout because of too much calcium for example or improper watering or too cold temps then theres already more than enough magnesium in the medium and adding more will not help. So a foliar spray which is immediate will allow the magnesium into the plant. But it wont resolve the lockout. Which has to be tackled too.
Foliar spray off Epsom salts is good, Foliar spray of cal/mag solution is never a good idea.
Foliar spray off Epsom salts is good, Foliar spray of cal/mag solution is never a good idea.
polishpollack
Well-Known Member
corey, where do you get such info?
im4satori
Well-Known Member
exactly
im4satori
Well-Known Member
foliar feed will provide quick response
1/4 tsp per gallon 2x 3 days apart for a mild def
1/2 tsp per gallon 2x 3 days apart for a more severe def
theres a balance between your potassium and calcium and magnesium, if one is high it can possibly reduce availability of the others
foliar feed is a quick remedy but you still need to address why your getting magnesium def issues
is it from lock out or basic def
but to answer that wed need to look at more info
medium type, nutes used, how you mix the nutes
1/4 tsp per gallon 2x 3 days apart for a mild def
1/2 tsp per gallon 2x 3 days apart for a more severe def
theres a balance between your potassium and calcium and magnesium, if one is high it can possibly reduce availability of the others
foliar feed is a quick remedy but you still need to address why your getting magnesium def issues
is it from lock out or basic def
but to answer that wed need to look at more info
medium type, nutes used, how you mix the nutes
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coreywebster
Well-Known Member
Mulders chart, the antagonism and synergism of one nutrient in relation to another.
Experience using foliar Epsom to deal with magnesium deficiency from over use of cal/mag in my own coco.
Too much Ca can lock out Mg and visa versa, Too much Mg can lock out K and visa versa.
Magnesium is known to be less available when root zone is to low temp, as I have seen myself this winter when I switched to Cobs from HPS. Solved that by adding heat for a few weeks and reducing ventilation, problem didn't get any worse after that.
What's your reasoning for disagreeing ?
polishpollack
Well-Known Member
I didn't disagree. I said adding mag to the substrate isn't a bad thing to do. If any problem will develop with the use of magnesium, foliar spraying will cause that problem to develop much more quickly. That's what I said. Maybe read post #4 again.
Since drcoop69 has failed to put up pics, it's impossible to see what the problem really is.
Since drcoop69 has failed to put up pics, it's impossible to see what the problem really is.
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drcoop69
Member
The medium is soil, burpee organics. Mixed in some perlite and a thin layer of my own composted super soil at the bottom of pot. I'm using Alaskan fish emulsions 5-1-1 once every two weeks and compost tea and molasses to boost the microbes. She is a clone I got from a friend and the first one I've had that looked like this.
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polishpollack
Well-Known Member
That doesn't look like magnesium deficiency, but that's not to say you can't give some and see what happens. It looks more like fert burn as people call it, too much nitrogen. Is it this Burpee soil? https://www.omri.org/mul-6531
It already has fert in it so you can probably avoid using the fish emulsion, which is kind of high in nitrogen in relation to the other ferts. Plus if you're using compost in the bottom that has animal waste, you're probably asking for trouble. Hopefully, it's just plant and yard waste in the compost.
It already has fert in it so you can probably avoid using the fish emulsion, which is kind of high in nitrogen in relation to the other ferts. Plus if you're using compost in the bottom that has animal waste, you're probably asking for trouble. Hopefully, it's just plant and yard waste in the compost.
im4satori
Well-Known Member
give us a pic of the entire plant please
do you have a method for checking the ph?
im guessing you might have a combination of issues
either your over watering or theyre getting too much N for a start
im guessing its too much N but it could be over watering or both
the fan leaves have that droop
do you have a method for checking the ph?
im guessing you might have a combination of issues
either your over watering or theyre getting too much N for a start
im guessing its too much N but it could be over watering or both
the fan leaves have that droop
polishpollack
Well-Known Member
yes could be over watering too. I didn't think of that, we finally agree on something.
drcoop69
Member
I'm leaning towards it being too much N bc I wait until the medium is dry up to a knuckle before I water again. But I do not use animal poop in my compost at all just house hold veg waste egg shells and yard clippings, leaves of previously harvested plants, bone meal. Yeah that is the bupee soil. I got a boat load of it free though so I'll just lay off the nutes and see how it goes fellas. Thanks for the help.
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polishpollack
Well-Known Member
the problem with compost is it takes a long time for bacteria to break the material down such that new plants can use it. If it isn't broken down, it's useless. best to just stick with that soil and only give ferts if you're certain you need to. if it looks like your plants need ferts, that's a good indication it's time to transplant to a bigger pot. this will give more nutrients without any guesswork.