As I wrote the solution now is to flush and start over with a liquid feeding schedule, even if it is not organic. Get the cheapest try pack from any brand and go ahead. The plant's are considered sick and this is the way to cure them at this stage. Also add an aspirin to each plant's water to help it recover.
If you have the Flora line OK use this after the flush in the suggested doses of all the range's products. Dolomite lime I never use because it messes up the ph and takes ages to release magnesium and calcium. If you use a liquid cal Mag there is no need for the Epsom salts. They are a good solution though. If you choose a ready liquid cal Mag prefer the GHE and avoid the AN product because it has an extra N 4, which is too much.
Unfortunately you entered in a vicious cycle of nutrient imbalance and autos are not easy to deal with such a stress.
Next time don't use the same amendments you started with this time . If you want to have a rich medium don't use these universal fertilisers with NPK 2-2-2 or 4-4-4. They are not good for cannabis, they are for the lawn in your garden. Roots organic is as I get it in that category. Get an organic slow release grain fertiliser for roses or strawberries that has NPK values that are around 7-6-12. And crushed seashell powder or granules for an organic source of cal mag. Add 2 table spoons before planting and every 20-30 days add 1 or 2 table spoons depending on the container size. Every 15 days add to your water a bio-activator with humic and fulvic acids and kelp extracts with aminoacids as a bloom booster.
Soil is more forgiving than coco. The best choice is to get a potting soil mix from a gardening store, usually their base is peat and they have extra perlite, coco and compost. You can get 40-80 liters at around 10 euro/dollars. If you can make your own mix then go ahead it is even better. I also don't buy the overrated soils of biobizz (they dominate the market here in Europe, as Fox Farm does in US) because of crap quality and high price. Coco you can reuse, the rest might need amendments. If you want to stick to solely coco it is fine but prefer liquid fertilisers because they act immediately and you can control easier. In such a case prefer either the Biobizz line or the GHE organic one and follow their schedules without deviation.