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Magnesium in Hydroponics · Hydroponics Daily

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  Welcome back to the Hydroponic Daily. I'm Dr. Russell Sharp,
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  the inventor of Goldleaf, and today we're talking about magnesium.
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  So magnesium is the central atom in the chlorophyll molecule.
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  It is the centre of the universe when it comes to photosynthesis.
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  Without magnesium, there's just going to be this empty hole in the chlorophyll
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  molecule that's supposed to absorb the light and transfer the energy to the
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  photosynthetic apparatus.
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  So magnesium, absolutely central. That magnesium atom is surrounded by some
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  iron atoms and then some nitrogen atoms and a whole carbon matrix.
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  So magnesium, absolutely essential for that. So you can imagine that the symptom
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  of deficiency is chlorosis or yellowing in layman's terms. There is no chlorophyll production.
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  Now it actually occurs between the veins on the leaves. That's the first sign
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  of magnesium deficiency.
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  The veins will stay dark green, and then the areas between the veins will go green.
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  Some plants, that'll be easy to see, especially those with large leaves.
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  Grasses, cereals, you're going to struggle to see that interveinal chlorosis
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  because all the veins run parallel as opposed to being branched in what we call a dicot plant.
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  By the time those symptoms have occurred it's probably
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  too late and your plant will be
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  health will be significantly impacted yield growth
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  will be impacted too much so make sure you've got magnesium sorted beforehand
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  the times you'll see calcium sorry
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  magnesium deficiency is when there's excess calcium so if
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  you're growing in soil if you've said you've applied
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  lime because you think you need high ph or because
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  you want to add calcium if you haven't applied dollar what's called
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  dolomitic lime which has a nice balance between magnesium and
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  calcium then you'll get excess calcium plant can't differentiate between the
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  two when they're absorbing them and so it just keeps on absorbing calcium doesn't
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  get enough magnesium or if you've applied too much potassium in hydroponics
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  this is probably probably where you're going to see symptoms of of deficiency.
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  All hydroponic nutrients contain loads of potassium and then there's additives
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  that also contain potassium and then there's you might be.
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  Stacking a base with loads of potassium with
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  an additive with loads of potassium and then another additive because you think oh i
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  want to boost from that as well and another additive and so you might
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  start to see symptoms of magnesium deficiency you can
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  counter that by adding simply epsom salts magnesium sulfate
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  and that's a great product to use if you're
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  ever suffering from magnesium deficiency in
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  arable crops and in the soil we we don't
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  tend to see a lot of magnesium deficiency in fact
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  we see magnesium magnesium toxicity and there
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  we we we sell a product called liquid gypsum to
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  to overcome a lot of the magnesium problems from
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  too much magnesium in the soil we also have a problem
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  with too much iron i mean in hydroponics you'd
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  love to have too much magnesium too much iron magnesium is
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  added in a calmag and so that's
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  another great source of magnesium is putting a calmag which has
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  a really good balance between calcium and magnesium and even
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  when you're using gold leaf sometimes people use calmag and
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  you still get great results with that it's a bit like a
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  safety net a calmag because calcium magnesium you will get impacts on crop quality
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  if you don't get enough so it's a nice warm cuddly blanket a life jacket what
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  you want to sit whatever you want to call it and so magnesium it's a it's a
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  along with sulfur and calcium.
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  They are secondary macronutrients required in significant amounts.
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  Symptoms? Intervenor chlorosis. Any comments?
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  Give us a good number of stars and things like that. All right,
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  thank you very much. That's been Hydroponics Daily for today.