MAGNESIUM:

Magnesium levels are represented as “%Mg” on fertilizer labels. Plants absorb magnesium in this form.

So if a fertilizer label reads:

1.5% Mg (magnesium)

In this instance there is actually 1.5% magnesium in the solution, but it does not guarantee that it is all in a plant-available form. The situation is similar to calcium. If using a modern hydroponic nutrient, it is very likely that all the magnesium in the solution is in available form. Less soluble sources of calcium and magnesium include Dolomite lime, Calcium Carbonate, and Magnesium Carbonate. Readily available sources are magnesium sulphate (Epsom salts) and magnesium nitrate.

Many types of crops grown indoors will benefit from elevated levels of magnesium. Keep in mind that levels should be maintained near a 1:3 ratio to calcium. Many growers report harvesting firmer flowers and fruits with elevated levels of magnesium. Magnesium is closely associated with keeping the plant “green” and acts as a carrier molecule for certain plant processes. Additional magnesium is often contained in and supplied with calcium supplements intended for hydroponic usage. In aggressive feeding programs, magnesium levels should be maintained at a minimum of 50 ppm.

So here we have had a very brief overview of the value of some of the macro-elements, the roles they play in plant growth and the levels needed to ensure healthy development. In the charts featured in this article we have an example of an 11 week feeding program.



• Weeks one to three are vegetative growth after cuttings have rooted

• Weeks four to five are transitional; shifting from veg. growth to flowering

• Weeks five to ten are flowering

• Week 11 is the ripening/flushing period

These are actual levels achieved by combining concentrated one-part nutrients as a base, and then “dialing-in” other nutrient values by applying a variety of supplements at different times and at different strengths. The overall feeding levels of this program are very aggressive. If using these levels as a guideline, it would be recommended to start at half these strengths and gradually increase the concentration to determine the crop’s threshold for nutrient levels before becoming counter-productive. For the simplicity and length of this article the charts do not indicate micro-nutrient values. When elevating levels of major nutrients such as Nitrogen, Phosphorous, Potassium, Calcium and Magnesium, micro and sub-micro nutrient levels must also be adjusted. Fortunately, most good quality nutrient supplements account for the required elevated levels.

Don’t pay so much attention to the actual numbers for the purpose of this example, and note that the individual charts have different ranges. Pay attention to the rhythm of the levels throughout the growing cycle, how they relate to each other and when they change - almost like sheet music for plants. These are not theoretically ideal numbers, but values that can be achieved with commercially available nutrients and supplements. Good luck, and remember that with feeding, sometimes less is more. It’s much easier to increase the strength than it is to take it away once applied to the crop.

Taken from Maximum yield by Erik Biksa

You should be Working for High Times, lol.. Appreciate all The Info, Saved me alot of time and awnsered alot of questions for me, Happy 420 !!! ohh yeah and happy bunny day, guess thats a holiday too

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