what you think

Quick Deficiency Guide

NITROGEN (N) Pale plants, red stems, smaller growth. Rapid yellowing of lower leaves progressing up the plant. Add any chemical fertilizer containing N. Treated plants recover in about a week.

PHOSPHORUS (P) Slow or stunted growth, red stems. Smaller leaves that are dark green. Lower leaves yellow and die. Add chemical fertilizer containing P. Affected leaves will not show recovery but new growth will apear normal.

POTASSIUM (K) Affected plants are usually tallest and appear to be most vigorous. Necrotic spots form on lower leaves. Red stems. Leaves appear pale or yellow. Add chemical fertilizer containing K.

CALCIUM (Ca) Lack of calcium in the soil results in the soil becoming too acid. This leads to Mg or Fe deficiency or very slow stunted growth. Treat by foliar feeding with one teaspoon of dolomatic lime per quart of water until condition improves.

SULFER (S) Plants suffering from S definciencies exhibit yellowing of new growth. Mix one tablespoon of Epsom salts per gallon of water until condition improves.

MAGNESIUM (Mg) Lower leaves yellow and may even turn white while veins remain dark green. Blades die and curl upward.

IRON (Fe) Leaves on growing shoots turn pale and veins remain dark green. pH imbalances make iron insoluble. Foliar feed with chemical fertilizer containing Fe or rusty water.

MANGANESE (Mn) Necrotic and yellow spots form on top leaves. Mn deficiency occurs when large amounts of Mg are present in the soil. Foliar feed with any chemical fertilizer containing Mn.

BORON (B) Growing shoots turn grey or die. Growing shoots appear burnt. Treat with one teaspoon of Boric acid (sold as eyewash) per gallon of water.

MOLYBDENUM (Mb) Yellowing of middle leaves. Foliar feed with chemical fertilizer containing Mb.

ZINC (Zn) White areas form at leaf tips and between veins. Occurs in alkaline soils. Zn deficiency can be treated by burying galvanized nails in the soil. Chemical fertilizer containing Zn can also be used.

OVER FERTILIZATION Causes leaf tips to appear yellow or burnt. To correct soil should be flushed with three gallons of water per one gallon of soil.

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grorite said:

does it look like nute burn to you i fed last night and it wasent there yesterday so thats my guess should i do a flush next water or ride it out

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imchucky666 said:

Whatcha been feeding?
They look good, but kinda light, like they want a little N, but the rust might be the start of a Potassium def.
I'm not positive, so wait on that, but that's my guess.
I like your lights though View attachment 2394542View attachment 2394543

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grorite said:

im feeding floranova bloom 6 ml per gal last feed i bumped it to 8 guess it was a lil much

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CEC And Buffering
CEC has been used historically to describe the buffering capacity of soil (mainly based on crops grown in field soils). Buffering means the resistance to change in pH or nutrient concentration in the soil solution. Therefore, a medium that is high in CEC would help growers maintain a stable pH or nutrient concentration over time.Media particles, such as soil or peat, have negatively charged "exchange sites" that allow the particles to loosely hold onto positively-charged "cations" (Figure 1). Cations include acid (hydrogen H+), fertilizer cations (e.g. ammonium NH4+, calcium Ca2+, magnesium Mg2+, potassium K+), and other waste cations (e.g. sodium Na+). Media with high CEC have the ability to absorb and release large amounts of cations from the soil solution, which evens out high and low concentrations of nutrients available for plant uptake.
Let's take an example of how CEC affects liming rates of acidic sphagnum peats. The exchange sites before liming are mainly loaded with acid (H+). The higher the CEC of the batch of peat, the more lime that must be added to raise pH up to around pH 6. That is why the amount of lime needed to reach a target pH may vary between sources, or why finer peats (higher bulk density with more exchange sites per unit volume) have greater lime requirements than coarser peats (lower bulk density with less exchange sites per unit volume).
CEC also helps explain how lime reacts with the growing medium. During the dissolution of limestone, some of the CO3-2 from the limestone neutralizes the H+ contained in the soil solution to form carbon dioxide and water. As the H+ is reduced in the soil solution, additional H+ moves from the exchange sites to the soil solution and is neutralized by the lime. Finally, calcium (Ca2+) and magnesium (Mg2+) from the neutralized lime moves from the soil solution onto the peat exchange sites. The net result is that the exchange sites become saturated with mostly calcium and magnesium, and the concentration of H+ in the soil solution is reduced (higher media pH).
Figure 2. Effect of root media on medium pH. The grower grade peat was
long fibered with little dust and the consumer grade peat was a
more degraded fine peats with large amounts of dust. All media
were blended with 30 percent perlite and the lime source
was hydrated lime (low residual). The crop was impatiens grown
with a water-soluble fertilizer containing 50 percent
ammoniacal nitrogen and RO purified water. Acceptable pH ranges from
5.8 to 6.2. Research by Bill Argo and John Biernbaum.
How will CEC of the peat buffer pH during crop production? Let's assume a grower uses an acid-reaction fertilizer (e.g. 20-10-20). This fertilizer adds acid (H+) into the soil solution, which lowers the pH. However, some of that H+ in the soil solution is exchanged with the Ca2+ and Mg2+ on the peat. The acidity is removed from the soil solution, and the pH goes back up. In the process, Ca2+ and Mg2+ are also added into the soil solution.
How can CEC buffer nutrient concentrations? A growing medium can exchange nutrient cations back and forth between the exchange sites and the soil solution, in the same way as it can exchange H+ acid. Therefore, the exchange sites act as a back up "pool" of nutrients to recharge the soil solution when nutrient levels are low.
Media that have high CEC (more buffered) can resist a change in pH or nutrient concentrations for long periods of time, whereas pH or nutrient concentrations can change very rapidly in media that have low CEC (less buffered).

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Jeffdogg said:

Hey that was the first nutes i used!! Good stuff keep in mind those nutes are PH buffered

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Jeffdogg said:

Nice my tap is around 8 with a ppm of 247, also a very good display of the difference between sativa and indica i might add lol..

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Jeffdogg said:

Im so stealing those charts for my collection ;P

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grorite said:

yeah i bought a ph meter to check runoff and shit but have stoped cuz it has never changed stays just about perfect water with tap water ph is 7.2

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