How much should I feed my plant in week 3?

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In week 3 around 1ml-1.5ml ,in upcoming weeks you can adding up ml ,don’t do too much as autos are more sensitive to nutes ,but plants will show if they burned or hungry for nutes ,just take the ph spot on 👍🏼

Hi mate, since you are growing autos and I am exclusively an auto grower, although I use advanced nutrients, my rule of thumb is a quarter of the minimum recommended dosage at start and progressing. In your week I would use 1 ml per lt. Hope was helpful.

If you PPM is aorund 400, it is a bit under fed. looking for aorund week 3 - 550-650 ppm / 0.8-0.9ec I use this link a lot for auto feeding guidelines, its not 100% so if you plant needs less/more give it that. https://www.autoflower.net/forums/threads/med-man-method-feeding-chart-ppm-ec.47856/ Best Of Luck!

Hey just be sure you're strict with the ghe criteria in hydroponic nutrient table and you're ok. Those three have the best ratio. Keep a look on the EC suggested and the micro solution is compliant to your tap water EC (soft or hard). Be sure about pH too. Most of the time those are the missing thing. Especially with mineral feeding.

oh as a plant this size i would not exceed around 0.8 to 1.0 as an ec level as general guidance for the laymen :)

yes as a dwc grower from my roots pardon the pun i have upwards of 7 years of dwc experience you can feed a plant younger than that if you have trust in your nutrients though I applaud you for waiting until the plant has its first set of true leaves :) you Sir are going to excell at growing cause you have what many of us do not which is patience the best and most valuable tool in growing :)