What happens to the plants and how can I fix it?

blendmedmedman thanks i will try your advice

i think the ph is too low if you grow in the soil, i'm not very experienced but some nutrients the plant can't take if the ph is too low. https://www.philosopherseeds.com/blog/wp-content/uploads/2015/03/PH-and-cannabis.jpg

flush your plant and get a run off of a 6.0 let your pot dry out, cut off those leaves they will never come back, they are taking energy from the plant trying to grow healthy for you. only the ones that are really damaged the lower ones. now when you feed you shop be adding a kelp in your feed. also a cal mag along with micro nutrients, iron, copper, ect. i would also suggest picking up a 20/20/20 all purpose nutrient. for your next grow. if you get that in time feed them once with a 1/2 table spoon per gal of water until a run off. this will hit the smaller micro nutrient deficiency. now this being an auto and she is at her 22nd day, you need to get this in shape before she flowers which will be soon. so take a deep breath and get rid of the most damage leaves, now flush check ph at run of for 6.0 feed kelp and cal mag if you can, all nutrients for the first 7 days is at 1/4 strength last add a root additive in your feed, keeping your roots happy and your plant is happy. make sure to get those leaves off, they are touching the surface of the soil, that is a problem as well . hope this helps