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What do you mean when you say you let the water run out 3 times? Are you saying you water it until it runs out, let it sit, water again a few minutea later until it runs out. And then do that again? IF so you are giving you plants way too much water.
The roots are drowning, you are pratcially flushing you plants every watering. Remember pot plants like to dry out completely in between watering, judge this by weight, feel how heavy it is after full watering, then again when dry.
In My Opinion, That plant int he pic looks overwatered. It might be showing a N deficiency a little, but that could mostly be due to the overwatering. I wouldnt water that plant for about a week. Dont use the dip the finger in the soil to check the moisture test either, its not reliable.
Over watering for sure. Wait until pots are pretty light and water 1 time. Also make sure your soil has tons of perlite in there to give the roots some oxygen.
yup overwatering . which inturn cause the other diffiencies you have.
let her dry out completly before next watering. mix up a nice batch of nitrogen ph'd water. not too strong and add some epsom salt at 1/4 teaspoon to the gallon of water. mix all this together and water her then wait til she dries completly in the week or so and water again with only phg'd water.. but you are drowning her and too much water can leech the soil of any nutrients and micronutriients
feed 7ml of Ionic grow on every watering. No plain water inbetween if you can avoid it.
Let the soil dry out completely. So let the soil dry out till the top layer feels dry. Then water either the next day or the day after. Or, you can even let your plants wilt and then water. Letting the plants wilt a bit from underwatering is not too harmful at all but overwatering is.
Give it half the amount of water you think it needs and let this soak for a few minutes.
Then give it the other half.
Give just enough water so that you have a slight run-off.
Every grower feeds different amounts of water but in vegg i give each plant about 1l per week or so. (500ml +500ml in one go, then let dry for a week)
OK I feel its good to try and get a plain water feeding in between each feeding, I dont want any buildups and be sure they use it all up.
Let the soil dry Completely, judge this by weight only, be testing only the top of the soil then watering the next day you are going wrong. The top half of the soil is going to dry out quickly, because it gets hit witth the light from the sun and the airflow. SO just because the top 2 inches is dry doesnt mean the bottom is. Get used to picking up your plants pre and post-watering to judge the watering needs.
Until you are completely familiar with the strain and pheno you are growing can you possibly judge it without in my opinion. Dont try to stick to a schedule of how much and how often if possible, becuase a plants need will change easily.
Just give your plants enough water to get a little run-off. Just like everyone has said. And the Half then Half method isnt a bad idea. Just stop after you starting getting a little run-off, dont do that 3 times thing, you are drowning your plants which is causing your problems.