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Soilmix wasn't pre fer... but i've fertilizated.
But one week ago, after transplanting I've supplied them a little npk 20-20-20
Are they overfertilizated or could be effect of low temperature ??
Yep flush them well, then they'll soon pick up and grow. Got any Superthrive to add to yer water on the last flush. Superthrive is good stuff for stressed plants......if not urine will do but dilute the amount by ten times....and I'm not taking the piss....it's another good plant tonic ( it's in superthrive anyway's )...good luck with yer grow and hope yer plant picks up soon...be safe...Stash
Urine has always been consisitant for me anyway but if yer worried about that one I would give em a tonic of some sort - maxicrop seaweed extract is another alternative but for me I use Superthrive....done side by side tests with this and it DOES work wonders for stressed plants....if they were my plants I would flush and then treat with a plant tonic....give em the best for really good results...but on the other hand cannabis is very forgiving and you can always do as wacky Tobacky says and not worry.
you can look around at gardening centers, or even Lawn Maintainence Businesses, there are formulate fert's available that contain Urea ( an derivative of Urine) and it's all measured out, so ...basically there is consistantsy in using Urea products:wink:
I disagree with most here. From my 20 years of growing all sorts of plants My first thought was frostbite, then I saw that you posted this in June. What latitude are you at? I have seen many tropical plants (house plants) exhibit this discoloration when exposed to sub 40 degree F temperatures for an extended period of time. If you are in the ground I would fertilize sparingly as underfertilization has much less a chance to occur in the ground unless your soil is REALLY bad.
this is from MyNmaeStichs' thread on Sick Plants (located at the top of this section :wink: ) ~Wikid hope this info can help ya...
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This picture is what light bleaching/ light burn looks like.
Only way to fix this is to Move the lights away from the plant!
Or make sure you dont go over 75 watts a sq foot, or your plant will have to much light and light bleaching can occur anywhere on the plant. (indica species seem to bleach easier than sativas imo.)
(Picture Provided by Boy Howdy)
Gl on your grow :wink:
These pictures is what heat stress looks like.
Only way to fix this is to Move the lights away from the plant!
And get better ventalation, and or add more fans! Heat - If the lights are too close to the plant, the tops may be curled,
dry, and look burnt, mimicking a
nutrient problem. Your hand should not feel hot after a minute when you hold it at the top of the plants.
(Picture 1 and 2 Provided by Mosfed)
This is the most common and loved nuteburn :teef:
Ahh, nute burn! Stop this by not adding to much chemical/organic nutrients to your water,foliar feeding. DONT feed more than 1 time a week, use 1/4 strength for first feeding and then go up to 1/2 strength from then on when using chemical nutrients. Its very easy to overdo it. Causes leaf tips to appear yellow or burnt. To correct soil should be flushed with three gallons of water per one gallon of soil. NEVER give nutrients to plants that are under 2 weeks of age, at this age the soil nutrients are enough to suppliment them untill 2 weeks of age or more depending on how good your soil is. Using ferts before 2 weeks will almost likley kill your plants.