randynewman34
Member
recently added a bunch of lumens. new growth has yellow leafs and purple stem. is this a lack of sulfur??? any info is appreciated. thanks
they r in soil
they r in soil
purple stems???????? plz help a brother out
- Thread starter randynewman34
- Start date
you need to feed .
| Potassium (K) Mobile Element and Macro Element Potassium plays a big role as well. Having good amounts of potassium in your plants helps in having sturdy and thick stems, disease-resistance, water respiration, as well aids in photosynthesis. Potassium is also found in the whole plant. It is necessary for all activities having to do with water transportation. Potassium is necessary for all stages of growth, especially important in the development of Buds. Having to little of Potassium in your plants causes the plants leaves to show retarded growth and show a scorched tip and edges around the leaves. Plants may stretch and your branches can be easily broken or weak. Don’t get this deficiency confused with iron, because it almost acts like iron but to tell the difference in the two is: for potassium the tips of the leaves curl and the edges burn and die. Older leaves may show a red color and leaves could curl upwards. Dead patches (Necrosis) can happen on the margins of larger fan leaves thus, the leaves will eventually die off and turn brown. The Older leaves will show different patches of color (mottle) and turn yellow between the veins, following by whole leaves that turn dark yellow and die. The plants overall growth slows down, mostly when they are in vegetative stage. To little amount of potassium also slows the growth of buds during flowering stages. Dark edges will appear around the edges of the leaf when the deficiency is starting to happen. When your Relative humidity is low, you can almost bet your going to soon get a potassium deficiency from your plants perspiration. Potassium can get poorly absorbed when having too much Calcium or ammonium nitrogen, and maybe cold weather. Having to much sodium (Na) causes potassium to be displaced. SO keep those in mind… Parts affected by a Potassium Deficiency are: older leaves and leaf margins. When you have too much Potassium in your soil, it can lead to big troubles, like salt damage and acid fixation of the root system, as well as too much potassium can cause a calcium deficiency. Your fan leaves will show like a light to a dark yellow to whitish color in between the veins. Due to a molecular imbalance, potassium toxicity can cause a reduced uptake and lead to the deficiencies of Mg, and in some cases, Ca. Also leads to the other nutrients to not be absorbed properly leading to lots of other deficiency such as: magnesium, manganese, zinc and iron and can cause problems with calcium as well. Problems with Potassium being locked out by PH troubles Soils with excessive Leeching and High ph soils and or water.Soils that are potassium fixated. An excess of kitchen salts (sodium) in the root system/enviroment. Soil Potassium gets locked out of soil growing at ph levels of 4.0-5.5 Potassium is absorbed best in soil at a ph level of 6.0-9.5. (Wouldn’t recommend having a ph of over 7.0 in soil) anything out of the ranges listed will contribute to a Potassium deficiency. Hydro and Soil less Mediums Potassium gets locked out of Hydro and Soil less Mediums at ph levels of 4.0-4.5, 6.0-6.5. Potassium is absorbed best in Hydro and Soil less Mediums at ph levels of 4.7-5.3, 6.7-8.5. (Wouldn’t recommend having a ph over 6.5 in hydro and soil less mediums.) Best range for hydro and soil less mediums is 5.0 to 6.0. Anything out of the ranges listed will contribute to a potassium deficiency. Solution to fixing a Potassium deficiency Any Chemical/Organic nutrients that have potassium in them will fix a potassium deficiency. Again Peters All Purpose plant food 20-20-20, will cure the potassium deficiency , Miracle grow Tomato plant food, Miracle grow All purpose plant food.( Only mixing at ½ strength when using chemical nutrients, or it will cause nutrient burn!) Some other supplements of potassium are: Wood ashes, which are fast absorption, Kelp Meal, which is medium absorption, Greensand, which is slow absorption, granite dust, which is slow absorption. Sulfate of Potash, Sulfate of Potash Magnesia, Muriate of Potash, which are medium absorption. FOXFARM GROW BIG HYDROPONIC CONCENTRATE, which is fast absorption. (FFGB can bring your ph down as well) Earth Juice Meta-K, which is fast acting. (Can bring down your ph as well) Leaves will never recover, but the plant will show recovery after about 4 to 5 days when using a fast acting nutrient. Note: Wood Ashes, can make your ph go up a bit, so please monitor your ph when using it. Now if you added to much chemical nutrients and or organics, (which is hard to burn your plants when using organics) you need to flush the soil with plain water. You need to use 2 times as much water as the size of the pot, for example: If you have a 5 gallon pot and need to flush it, you need to use 10 gallons of water to rinse out the soil good enough to get rid of excessive nutrients. Picture 1 and 2 shows a Potassium deficiency ( Thank You General Ganja for letting me use Picture 1!) 
[HR][/HR]Last edited by MynameStitch; 10-28-2010 at 10:36 AM.. Reason: New Title | |
| https://www.icmag.com/ic/showthread.php?t=11688 |
Slipon
Well-Known Member
pictures would help us a lot providing you with solid advice
purple steams can be strain/genetic related and not sum thing I would worry too much about (can also be too much P)
on the other hand, new growth that is yellow/pale green is sum thing I would address asap. can be a few things, lack of nitrogen or a PH that is out of track so the plant can't take up the nitrogen, or lack magnesium, if so, some epsom salt can be the answer (epsom salt = magnesium sulfate)
View attachment 2912113
View attachment 2912116View attachment 2912118
purple steams can be strain/genetic related and not sum thing I would worry too much about (can also be too much P)
on the other hand, new growth that is yellow/pale green is sum thing I would address asap. can be a few things, lack of nitrogen or a PH that is out of track so the plant can't take up the nitrogen, or lack magnesium, if so, some epsom salt can be the answer (epsom salt = magnesium sulfate)
View attachment 2912113
View attachment 2912116View attachment 2912118
Magnesium defeciency ( either through true defeciency...or lockout ) is a key indicator for newly formed red/purple stems. Per Slipon above. Take my advice with little salt. I have been doing a lot of research, but very new.
i have this link bookmarked. https://www.rollitup.org/marijuana-plant-problems/216537-self-diagnose-your-plants.html
by the way, red or purple is not an only indicator for mg, as some species have innate characteristic of red purple stems. My seedlings I refuse to believe are mg deficient right now. Premium soil, but I believe it's just part of their genes. Mine are voodoo star and blue dream right now. /shrug
You did not mention how old they are or provide much else... Pics help like a pro
i have this link bookmarked. https://www.rollitup.org/marijuana-plant-problems/216537-self-diagnose-your-plants.html
by the way, red or purple is not an only indicator for mg, as some species have innate characteristic of red purple stems. My seedlings I refuse to believe are mg deficient right now. Premium soil, but I believe it's just part of their genes. Mine are voodoo star and blue dream right now. /shrug
You did not mention how old they are or provide much else... Pics help like a pro
randynewman34
Member
so... I appericate all the responses def all good info.. it was because of to much light. returned to the light I had b4 and everything is slowly returning to normal. thanks again!!!!
Yeah my new breeds all have purple stems. With my weak growth I was wanting to assume it was mg deficiency. But thankful I did more reading before assuming it was the answer. The key to the magnesium deficiency would be newly formed red/purple stems and shoots. But more specifically " green veins with general yellowing of the leaf marked early on the older sets of leaves as the deficiency stretches to the top part of the plant.