Wrinkled leafs

Hey I feed my seedlings even with 2.0 ec I have never had any bad experience like that they always look very happy! an Argument to make would be its wasting fertilizer because less would be enough already but I like to set my ladies a full table from the beginning! In vege its not that big of a problem if you feed a bit to much because even if they burn you just lower the dose and keep veging until they are good again, but in flower you have to be careful because once they are really burned feom the nutes you can not really get them back to fully normal and it could have a big impact on the outcome !in my opinion 1.8 is absolutly fine just make sure the run off isnt much higher ! I grow in coco I am in week 4 flower i feed ec 2.5 amd my run off is 3.0 ec with athena blended line synthetic nutrients After week 4 I will start lowering my ec so i will get down step by step again ! in coco in my experience the run off can be higher than in rock wool before they start burning so what i want to say is in rockwool i would not let the run off get to 3.0 ec maybe 😁✌️🏻

I didn't read all the way to the bottom. A gallon may be a bit much for them at that stage. I think roots may not be developed enough deep enough to dry that up yet. When they are young and still trying to get a foot hold it is very easy to overwater.

soil comes hotter than what you are feeding. if you are religious about 10% runoff, shouldn't be an issue. this look great. you can pretty much maitain a 1.3-1.5ec (nutes less tap EC) and react to plants as needed. i have very hard water. probably as high or higher than you... 4 years of doing this at those concentrations early on with no problems. i've tried babying them before and all it resulted in was slower growth.

Yeah, ppm is a bit high. I have well water at .6ec from the tap. It works just fine for the most part. For a plant that size I would be aiming for around 500 - 600ppm total. It doesn't need a lot of food yet. Nice light feeding and nice light watering between feeds. Making sure to let it dry out between each.