Soil EC low and not rising.

Sup growmie?! I just skimmed through your diary. I am not 100% sure what happened, as you start Germination with a plant that is either in mid to late veg or an autoflower that has already started to bloom. My 2 cents from what I know and see from your pictures: #1 "Keep the environment steady overall. "NO nutes can make that better, but they can make it worse." #2 Small adjustments for next grow. Fill the pots with soil until 2-3cm up to the rim, dont waste your space, buy an other package of soil, if u must. Its worth it in the long run! When you start with autoflowers, ( i did not put them inside their final pot ) most people say its best to put them in their final pot right away, which would be minimum a 3G pot and better a 5G if you have the space for it. Its because they can ease into without disturbing. They are on a clock. Ruffly 21 days after plant they will start to bloom no matter what, thats why u have to make sure the first 3 weeks run smoothly, which is hard if u start out. ( it was and is for me ) General Rules: feed with low water first. 10ml for small pots/cups and up it to 100ml when they reach their 3g pots. 1st day water, 2nd day leave them be, 3rd day maybe some more water. Keep RH above 65% at the begining, they dont have roots to get enough water anyway. If you keep soaking a big pot, you will easily drown them and the soil at the bottom stays when and disturbes their little root hairs, thats how I got my 2 dwarfs xD. Dont water the leafs! The air has to be humid. After 2 weeks they should have some more roots and 21 days they start bloom, this time u can and should add some calmag, they need that for their cells and rapid growth. I cant tell you about your fertilizer as I am using different brands but the internet or the brands website should have good feeding schedules, you will get there. The flowering and the dwarfs wont shoot or climb anymore, keep ther environment stable and steady thats the best u can do for them. 55% to 60% rh, 21-25C day and 18 - 20C at nights. The one that has huge leaves looks promising. Don't repot when they are already flowering ! Its too much stress. Last window is 1 week BEFORE flower! I hope my wall of text helps you on your journey. Happy grow!

0.1EC is around 50ppm on a 500 Scale. I doubt its really 0.1EC/50PPM, Happy Frog is kinda hot and all the toher things adding into are also going to boost it a bit. May be an error in how your measuring soil EC or the monitors its self. Plants are looking happy though in the first few pics. the last ones they looking a bit overfed. With soil you want to feed it once and then water the next 2-3 times but not till runoff. then feed again with a bit of runoff. It holds onto more of the salts then other mediums in my experence.

fertilizing in soil is like learning to ride a bike.. depends a lot on the soil and fertilizer used. as the soil contributes less over time, you slowly ramp up fertilization. It might be best to react to mild leaf smyptoms the first cycle and keep track of when such things happen and frequency/concentration of the fertilizer etc.. then you can review notes and avoid the symptoms altogether - for the most part. Any time you change products or soil, may need to relearn a bit. you can learn in less systematic ways but it'll take longer with more fuckups... you can wing it too... whatever floats your boat.

You are measuring soil ec with what? For a metre to read ec requires two things water and salt. For you to say you added x, y and z nutrients Into a organic soil of happyfrog and still say that you read 0.1ms/cm? That's literally impossible when water is present. So either you don't have a ec metre for soil maybe it's a tds for water solution. Something is not right. If you go the organic route then I'd say repot Into airpots, oxygen is often overlooked In its importance within a medium. If it's under 0.5ms/cm then not even the microorganisms are functioning no oxygen, no micros, no organic breakdown, no breakdown no new salts. Only thing that could wipe out entire process is a pH skew with a lack of O2. Gluck