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#16 | ||
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Cannabis Connoisseur
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Check your PH. I could be wrong, but this is what it looks like.
Problems with Calcium being locked out by PH troubles Very acidic soils with excessive potassium, dry and or wet soil. Lack of calcium in the soil may cause too acidic soil. This may cause to Mg or Iron deficiency or very slow stunted growth Soil Calcium gets locked out of soil growing at ph levels of 2.0- 6.4 Calcium is absorbed best in soil at a ph level of 6.5-9.1 (Wouldn’t recommend having a ph of over 7.0 in soil) anything out of the ranges listed will contribute to a Calcium Deficiency. Hydro and Soil less Mediums Calcium gets locked out of Hydro and Soil less Mediums at ph levels of 2.0- 5.3 Calcium is absorbed best in Hydro and Soil less Mediums at ph levels of 5.4-5.8 (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 Calcium Deficiency. Solution to fixing a Calcium deficiency To fix a calcium deficiency you can treat by foliar feeding with one teaspoon of dolomite lime or Garden lime per quart of water, Or Any Chemical/Organic nutrients that have Calcium in them will fix a Calcium deficiency. (Only mixing at ½ strength when using chemical nutrients or it will cause nutrient burn!) Or you can take crushed up dolomite lime or garden lime in a gallon of water and water it in the soil. 1 to 2 teaspoons per gallon of water, which will be slow acting. Garden Gypsum, which is medium absorption. Limestone, which is medium absorption, Rock Phosphate and Animal wastes which are both medium/slow absorption. Note: Caution when using gypsum to an already acid soil (pH that is less than 5.5) can have a very bad effect on different types of plants by effecting the absorption of soil aluminum, which is poison to plant roots. 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. Pictures 1-2 shows calcium deficiencies. First one shows late, 2nd one shows early development. ![]()
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#17 | ||
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420 Member
Join Date: May 2006
Location: The US and A
Posts: 2,256
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Yeah, that doesent look like nute burn to me...
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#18 | ||
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420 Member
Join Date: Jan 2008
Location: Colorado
Posts: 781
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Hey Boss and Berry thanks for the suggestions. I tested my soil which is 6.8 - 6.9 ph. However, I have been adjusting the water I use to water and spray them with so I tested the water and found that I may have miscalculated as my water was at 4.5 ph. I try to keep my water at 5.5 - 6.0. Do you think I can continue to use water with a ph between 5.5 - 6.0? I make small batches of water so I am pretty sure that I have only been watering with 4.5 ph water for about a week.
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#19 | ||
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Cannabis Connoisseur
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That PH should be ok, just watch the amount of time between waterings and make sure they are dry enough before watering again. As ***** pointed out to me, leaves looking like that can be a sign of having wet soil for too long.
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#20 | ||
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420 Member
Join Date: Jan 2008
Location: Colorado
Posts: 781
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I am watering every day at this point but verified that the containers are dry by the next morning. I using the wet/dry watering cycle and am sure that after I transplant to larger pots that, like with my current grow almost finished, I will be watering approx every 2 - 3 days or so. I am using a large wooden match stick to test for wetness and going by feeling the weight of the plant when it is dry and just after watering.
Also, today I decided to switch out 2 of the 100W equivalent soft-white bulbs for 2 100W daylight bulbs. So now I have 2 100W soft-white and 2 100W daylight bulbs. I figure I'll see how the mix of light affects the plants. I have 4 new strains coming that I can't wait to start either. Arjan's Haze #3 White Widow Bubble Gum Columbian Red Haze
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#21 | ||
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420 Member
Join Date: Jan 2008
Location: Colorado
Posts: 781
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Out of the 4 plants only 2 are showing signs of trouble. I think it may be a deficiency, possibly maganese. Yesterday I gave all of them a 1/2 strength mixture of maxigrow vegitative nutrients and transplanted them into 3 gallon buckets. The affected leaves are also brittle. Anyone have any suggestions?
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#22 | ||
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420 Member
Join Date: May 2006
Location: The US and A
Posts: 2,256
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As long as the new growth looks good, you should be fine. Leaves do not repair themselves so look for that same thing happening on other leaves closer to the top. You might have already fixed the problem and the leaf might just die off...(they normally do).
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#23 | ||
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Cannabis Connoisseur
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Send us some more photos of the plants individually :-) Please?
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#24 | ||
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420 Member
Join Date: Jan 2008
Location: earth
Posts: 144
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soilless mixes(peat+pearl) work best at about 6.2 ph. also you are running a low amount of lumens (low metabolic rate) so you should water more than you feed to allow the plant to absorb all the nutrients . if you have any live stuff in the mix (compost or real soil) then ph needs to be at about 6.7.
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#25 | ||
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420 Member
Join Date: Jan 2008
Location: Colorado
Posts: 781
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My soil ph is 6.9 but I guess if I foliar fed them with 4.5 ph water that could have caused the lockout? I sprayed them with plenty of fresh water yesterday too. I am having an issue with uploading pictures now and have sent email with screenshot to the webmaster so hopefully I'll have some pictures soon.
Also, I did move these 4 plants under a 400W MH so they should get plenty of light now ;-) |
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#27 | ||
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420 Member
Join Date: Aug 2007
Location: Zion, FL
Posts: 987
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The new growth looks good and healthy. Best of luck!
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#28 | ||
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Cannabis Connoisseur
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I think thats nute burn.
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#29 | ||
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420 Member
Join Date: Jan 2008
Location: Colorado
Posts: 781
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I'm not too sure what it could have been since I know that I sprayed them with 4.5PH water by accident and gave them nutes at the same time. Anyway, Greenhand, the new growth is looking much better, thanks!
I'll post some new pics next week after they have grown a bit more. |
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#30 | ||
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420 Member
Join Date: Jan 2008
Location: Colorado
Posts: 781
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Day 33 from seed and they are looking much better! I really think it was the 4.5PH water I was spraying them with accidentally that was causing problems a week or so ago. I decided to use 18/6 light cycle to save a little on electricity. I am watering them with approximately 32 oz of water every 3 - 4 days and every-other water I started using 1/2 strength nutes. I will go to 3/4 strength for the rest of the veg cycle.
Does anyone know how tall these plants will get? This is my first time growing Chronic and I only have about 5 1/2 feet of height from ground to bottom of light. They are between 9 & 10 inches in height now and I was thinking of going to 12/12 when they get to be about 18 - 20 inches, will this make them too tall for me during flowering? I have another question about trimming them. Do I want to cut a few of the bottom branches off of these or just let them be? I have no experience with topping, etc... Although, Serious Seeds does not recommend topping this plant. Here are the recent photos: |
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