Brown burnt tips on smallest leaves

High, This is caused by nuteburn. It is better to start with lightmix. I do always use BioBizz lightmix this contains enough nutrients for 2 weeks. So you can control the nutrients after 2 weeks. The Allmix contains nutrients for the first 6 weeks so you can not feed them as you wish for the first 6 weeks. I would just keep giving plain water till they are 6 weeks old and then start to build up the nutrients. Happy Growing! 😋

If the soil is to hot it can cause the tips to burn but they should have been like that or showing some signs of that before the homemade spray. I have used a homemade spray for spider mites before and it did not work the best but has some good results. For trips I would use beneficial predator mites. Or something with Permethrin's Best Of Luck! ***disclaimer, multiple people are answering all questions as there is a contest called GOTM, when a user is selected as the answer they get a point. Please see the contest page for information regarding the details: growdiaries.com/giveaways/GotM-August-2022 Please note, when you reply to anything on the questions part of Growdiaries website, no one will be notified of this. Not even if you use a "@" tag in their name. Best to reach out to them in DM using your inbox, it can be found in the bottom right hand corner of the site. It's the small paper airplane button, it will be highlighted green if you have new messages***

Burning from being sprayed with your home made insecticide, plants can not tolerate alcohol!