Leaf discoloration early in grow

Check the ph of the soil first. And also do a slurry test(mix a little soil with a little water in a glass, leave it for 5 minutes, mix again and test ppm). This will help determine if your soil is too hot or too alkaline, I think it will be because of one of these things. 🌱👍

Looks its dessicating.

I think you may have PH shocked them somehow and no tap water will only in rare cases give you lock out. My Tap is 6.6 last Grow my house was at 7.1 all worked fine what happened to me was I did PH my water/nutes before Fertigating. If your in Coco mix that hasn’t been buffered with Cal mag it will do that to your seedlings also. So give them a Cal mag feeding because it won’t hurt and can only help and make sure your PH is on point. You could be using fresh soil that’s PH’d wrong out of the package too so just deduce by checking 1 thing at a time or maybe 2 if it’s beneficial either way. Also the damage done will not go away so don’t use that as your gauge of wellness just check the new growth and make sure it’s clean fresh and green no spots or whatever then you know your in the clear. Step 1 PH 2 gallons of water to 6.1. Step 2 flush with that water until run off for 2 sessions and I mean fill it, dry it Fill it all in 1 day. Step 3 mix Cal mag in a mixture of like 5-8 ML per gallon, add maybe only 2 ML of your Veg nutrients and PH the solution to 6.1-6.5 after you add everything in. Then tomorrow feed that to it in low volume doses with a Syringe. If you’re growing in Coco you won’t have any problems with doing these steps and having results if you’re growing in some sort of soil organic soil or heavy soil you’re gonna want to do the spy feel because you don’t want to drowned those things you can’t drowned your plants and Coco unless their seedlings in your filling the whole pot to the top so when you flush them with your pH clean water just do the area around the base of the ceiling stem and just keep going until you see runoff down on the bottom

Small amounts of water at this stage, like maybe 1-2 ozs, and no more until the soil starts drying out. Certainly no nutes at this stage. Happy growing.

Too much water

Look at those tiny Girls in that Huuuge containers, filled with wonderful ( I hope so) MJ-Soilmix, stuffed with Nutrients and beneficals No its no Defiency at all---- this Girl has enough Nutrients for Weeks.Iam looking closer now and anwser in the comments