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| The Hospital Sick plant symptoms, & cures. |
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10-12-2008, 11:34 PM
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 Need advice with yellowing plants
I just started my very first grow and decided to go ewb and flow with rockwool 6 inche cubes... I started with clones,3 hindu cush+shunk and 3 grand daddy purple... They are 2 weeks 2 days old and about 1 week ago,they started to get yellow on the new growth and contiue to do so no matter what i do... I have flushed with plane water 2 times now and have cut back on my nutes to half, Botanicare liqued karma and pure blend pro... I was also watering 2 times a day and now have cut back to everyother day once a day, The cubes never dry out so i took the plastic wrap off of the sides too dry faster... here are a couple pic's...hope you can see... Thanks....      |
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10-13-2008, 01:01 AM
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My guess is some kind of pH lock. What pH is the water/nutes (and from what source is the water) you have been feeding her? BTW, welcome to GreenPassion! Be sure your next stop is at the Introduction Forum and let us kow a bit about your. Great place, and superb folks hanging around this site (they are why I'm here!), so make yourself at home. ISO
__________________ The Essence of Compassion "Resolve to be tender with the young, Compassionate with the aged, Sympathetic with the striving and tolerant of the weak and wrong...... ...... because sometime in your life you have been guilty of all of these." |
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10-13-2008, 01:32 AM
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Thank you, been doing alot of reading and i like this place... My ph in the tank is 5.5 and the ph in the rockwool is 6.5 and the temp in the rockwool is 61 to 63... I dont have a ppm meter yet, bit i am sure that will be my next purchase... I just use same water i drink for watering... |
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10-13-2008, 08:26 AM
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And what Ph is your water? If you don't know, that is your problem. I use RO water for all my plants. If it is city water, usually has all sorts of things added to it. You should at the very least let it sit for 24 hrs with an airstone so the nasties, like chlorine and floride have a chance to evaporate. And get that ph meter sooner rather than later. I am a dirt grower so I will wait till one of them chime in here for hydro. Good luck, and please do drop by the Introduce yourself thread and tell us about yourself. Peace
__________________ Life, j-angel aka GP purrie kittie attack cat!  My Little Grow LST'ing w/Hardware My Outdoor Odyssey 2008 BONSAI MUMS My Little Grow Indoor To Outdoor 2009  |
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bearklaw (10-13-2008) | ||
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10-13-2008, 09:10 AM
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It looks like a problem that I had. It turned out that I had a Magnesium Deficiency. I corrected it by using Epsom Salt to the ratio of 2 teaspoons to 1 gal of water. Mine started with the yellow splotchs between the veins while the veins stayed green. Then the edges of the leaves started to curl upwards and the tips of the leaves started to twist. There is a really good problem chart on the grow faqs section with pictures that describes the common problems with pictures.
__________________  Everything's Relative
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bearklaw (10-13-2008) | ||
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10-13-2008, 10:39 AM
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salt buildup in your soil due to excessive feeding and pH lock up - jags are up which is normally a sign for either heat stress or too high EC, burned spots are a further indication for an too hig EC level in your soil and the lockup of nitrogen is due to desalinization thru the high levels of nutrient salts. the done damage is irreversible, sorry to tell you, but further damage can be averted by leach our babies soil with only pH'ed water till the soil returns to an healthy pH level around 6.5 and the EC is also lowered as the builded salts got flushed out. Just follow ISOs tutorial on leaching soil and you will back on track 
__________________ Keep the gun oiled and the thumb green!  |
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10-13-2008, 11:12 AM
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 Quote:
Peace
__________________ Life, j-angel aka GP purrie kittie attack cat! My Little Grow LST'ing w/Hardware My Outdoor Odyssey 2008 BONSAI MUMS My Little Grow Indoor To Outdoor 2009 |
| The Following User Says Thank You to jangel For This Useful Post: | ||
bearklaw (10-13-2008) | ||
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10-13-2008, 11:17 AM
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Do you have a fan going in the grow area to circulate the air ? How much lighting do you have ? Maybe 61 or 63 degrees is a little to chilly to stimulate good root growth on your clones. I am just guessing , throwing some ideas out there for you . Maybe someone with more knowledge will chime in on this especially on the temperature range. ? Hope this helps |
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bearklaw (10-13-2008) | ||
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10-13-2008, 11:31 AM
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I am growing hydro and i am pretty sure it is ph lockout, so i had a 5 gallon bucket sit over night and put the ph at 4.5, to get the blocks down to 5.5 ph.... So i dipped then in water until i got the ph down to 5.5 and shook out all the water, because they hold a lot of water... Now is the waiting game and i will keep every one up to date on progress... thanks for every ones help... |
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10-13-2008, 11:33 AM
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 - bearklaw then get some pH paper strips for 4.5-7.5 range or at even better for the range between 5.5-6.5 as they are then more accurate (sooner or later you should think about investing into an EC and pH meter). once our are on the shopping trip for these paper stips get enough demi water for your system and drain what is in it now. hydro systems can also build up salts if not drained from time to time and feeding without knowing the EC is a risky method anyways (caused me plenty of trouble in my E&F system)
__________________ Keep the gun oiled and the thumb green! |
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jangel (10-13-2008) | ||
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10-13-2008, 11:37 AM
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10-13-2008, 12:16 PM
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when you get that meter keep in mind to buy enough calibration solution, nothing sucks more then to have to toys but no option to check if they functioning correct
__________________ Keep the gun oiled and the thumb green! |
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10-13-2008, 04:11 PM
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I just got my ppm meter and have a question. I know my plants should be at about 8000ppm,But i can not find a chart for ppm for the plane water to see what is to high. I thought i seen it some where... |
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10-13-2008, 04:17 PM
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If yer running 8000 PPM then a few charcoal covered twigs is all you will have for a plant...8000 PPM is just a bit.....  Plain water (no nutes added) from your tap can run anyhwere from 0 to 400 PPM, depending on what your source puts in the water to make it safe to drink. Average is likely around 200-250 PPM for tap water. ISO
__________________ The Essence of Compassion "Resolve to be tender with the young, Compassionate with the aged, Sympathetic with the striving and tolerant of the weak and wrong...... ...... because sometime in your life you have been guilty of all of these." |
| The Following User Says Thank You to ISO2BWELL For This Useful Post: | ||
bearklaw (10-13-2008) | ||
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10-13-2008, 04:24 PM
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thanks again...I love this place |
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10-13-2008, 04:30 PM
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do use and brand label fertilizer specialized around "hemp"? if so look up their web page, the usually list feeding schedules that work well. 8000ppm is awfully high value - i used never more then 1400ppm what gave my plants already burns with my hesi hydro fertilizer, the usefull range measured with an Hanna meter is between only 800-1100ppm and then you working already under full steam. tomatoes are need more fertilizer then high grade cannabis strains and even those grow with only 1600ppm pretty darn well. i would say you can dilute your mix at least down to 1/8 of it current strength. For compareson between the diverent brands of meters as ppm and ppt are not true units as the Siements units for example (µS/cm or rather useful to grow with mS/cm) PPM-EC-CF Chart Added by: Bud-Monkey Last edited by: snoofer Viewed: 63 times Rated by 7 users: 7.86/10 
__________________ Keep the gun oiled and the thumb green! |
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10-13-2008, 04:48 PM
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 the big killer is always the chlorine in tap water, or a salt filter system if you in hard water country - basement-jack has one of this sytems in his place and he was fumbling around with my DWC unit as i wasn't using it... poor guy really forgot about it, didn't use an EC meter and killed everthing within a few days
__________________ Keep the gun oiled and the thumb green! |
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10-13-2008, 06:57 PM
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it looks like it could be zinc deficiency. 5.8 to 6.0 is the ideal ph where you want your tank set to. some nutrients cant be absorbed at a ph of 5.5 henceforth the zinc deficiency. 5.5 is the ph you should soak the medium in to get it ready for hydro. raise the ph of your res tank to 5.8 to 6.0.  Last edited by 4everhydro; 10-13-2008 at 07:03 PM. |
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jangel (10-14-2008) | ||
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