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Google says yellow between veins is caused by iron...
The_Projexxanswered grow question 6 years ago
Your plants are fine brother ! They aren't suffering from anything . The main thing you wanna focus on when they are young like that is not over watering them . Your starting PH in a soiless mix in my opinion should be 6.1 6.2 and you would gradually move it up to 6.3 or 6.4 this will ensure that your plant will not suffer from nutrient lock outs . I can see that you are folliar spraying your plants although this is good for them I wouldn't do it every day I would do it every 3 days or so , reason being is that when they are young like that a lot of what they absorb is through the leaves , so do it sparingly when young like that so you avoid over watering issues . As they get a little bit older you can add a rooting stimulate like piranha or voodoo juice (anything like those products is fine don't have to be those ones) a chelation agent ( humic / fulvic acids) and very very very light dose of which ever Veg solution you have chosen . If you do these things you will have no problems in the veg cycle and you will have wonderful healthy plants . I hope I've helped a little bit :)
CRiSPrGrowanswered grow question 6 years ago
hey man that doesn't look like iron deficiency yet, but what you can do is add some molasses to the mix, it's bio and it's very cheap. take two tablespoons and dilute it in warmish water before adding it to your "non feed day" waterings. It has iron and a bunch of other micronutes. Check that the tap water you're using doesn't have any bad stuff in it like chlorine and other stuff with 5gs of active carbon then let it sit for a couple hours. good luck ! 🚀
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BillMonroeanswered grow question 6 years ago
Fresh growth is usually yellower/lighter green. There is nothing wrong at all with your plant. The veins are not yellowing. The cotyledons are still fresh and green, which indicates that your plants don't need a drop of nutrient for about another week. The real leaves look green, well-shaped and healthy 👍
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Athosanswered grow question 6 years ago
At this stage, it's not iron deficiency. It probably is pH related; check and adjust your pH between 5.5 and 6.0; nute wise focus on calcium and magnesium; 0.4 to 0.5 EC (200 to 250 PPM) should do at this stage.
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