Using nutes with AF

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can't read entire substrate -- mix of peat, vermiculite ... If soilless, you want to fertilize every single irrigation somewhere between 1.3-1.5EC at full maturity. May want 2/3rds of that for a seedling just to be safe, but even 1.3 isn't going to have a negative effect on most plants. if you are using promix hp/bx "peat", that comes with a 1EC charge, fyi. always get 10% runoff - more is okay too as long as some common sense is applied, but 10% runoff is enough to maintain a safe range of EC in the substrate between irrigations. Aslo will help maintain pH and general consistency in the substrate. be religious about this and you'll more easily be able to dial in your nutes with less potential misinforation. With autoflowers, i'd start closer to 1-1.3EC, then observe and react to the plant. If not lush enough, bump concentration up. If overly lush, draw it back a bit... in this ballpark you can change concentration slowly by 5% and observe and react patiently... see results, make adjustements. @ 6pH, i'd suggest these n/p/k ranges, respectively. Again, prolly best to start at low end for autos, and immature plants may need less too. This is for mature vege or bloom. 120-140 45-60 180-210 Ca/Mg/S can vary duet o different tap water used.. so these are probably closer to minimums because i have hard water. 100+ 85+ 100+ you may need more calcium/magnesium, if your water is better than mine. It's a misunderstanding when ppl say "coco reuires more calcium" .. this is false. the plant still uses nutrients the same way regardless of substrate. What is different is that poorly processed coco can leech calcium out of solution and release K, Na, et al. (cations with lower affinity than Ca to teh bonding sites). Coco is great, but only if well-processed. Most companies have bad batches occasionally. Anyway, it'll leech for a while until it reaches an equilibrium given what you feed.. then it would function normally after that... this is what "buffering" properly does before you get it. making sure the bonding sites of the coco are not filled with molecules that will fuck with your nutrient regimen. life is deterministic and rules by cause and effect... mysticism has no place here.

All depends on the nutes, soil or coco ECT. Normally for me I use light mix soil start giving them grow and bloom at 0.25ml per litre. Root stims always go in for me, some type of kelp is another must. Most boosters like big bud for example go straight in as the bottle says. It's the base nutes that are the real power so it's always best to start low and go slow.

Depending on the nutrients being used, you can mix up and use them over the next couple days. Just keep an eye on pH. It looks like you are in a “soil-less” medium of peat and coco. Assuming there is no amendments in there- you should be feeding every time you water. This is the way for inert mediums like this. As far as what strength to feed - I would shoot for an EC rather than just a specific fraction of the dose. You should have an EC meter and pH meter if you’re wanting to grow properly in this medium. At this stage, I would likely be feeding 0.8 EC (give or take) and see how it reacts. If you don’t have these meters, you should invest in them. And in the meantime I’d probably start at 1/4 dose and work up from there.