Always happens around week 2? Feel like it properly stunts it for a good week whatever is going on
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Coco and perlite
5-3-4 dry amendments
I thought it may of been deprived of nutrients like it hasn’t been released yet due to small waterings
Gave it some nutes at 450ppm with its first big water before picture was taken
My water is ph 6.3 run off is around 5.5 from memory
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Coco needs to be between 5.8-6.0 going in.
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Is my run off value not that important?
Your runoff isn’t too low. Kinda low, but not bad. If i start seeing issues (i grow coco using jacks nutrients) i will mix a batch, make sure it’s not too hot, and pH it right to 5.9, and flood out the pot. Since coco drains and dries quick, it’s tough to overwater. Kind of like a flush to help get the medium pH in line with what you feed.
I’m not familiar with your nutes, but others will come along also to help out.
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Routine fertigation Growmie, coco needs to remain damp…never let it dry out 
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Yea the nutes are just a organic npk of 534 + gypsum and worm castings, when starting this venture I waned to just be able to water my plants and leave them but learning it’s more then that which I enjoy because it’s hands on so I think I’m going to either get Advanced nutes micro,grow, bloom, or canna coco a b or dutchfest hydro coco a+b the dutchfest is cheapest here in Aus but havent found many reviews
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The top of my coco gets bone dry but under that a bit of moisture that’s when i start watering, which is about every 3 days, probably could wait longer but patients is hard haha
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You can’t really treat it like soil. Unlike dirt a coco perlite mix traps a lot of air in it and, properly prepared, has excellent drainage. I’ve messed up my AM/PM on my irrigation timer more than once(too many dubs). Even after 50ish gal of water, they weren’t wilted. my grow room was flooded though. They were happy to have another drink that evening went back to 4 waterings a day the next morning. It is very hard to over water. I don’t bother with runoff ph but I guess it doesn’t hurt if it helps you. Runoff EC is critical in coco. always water to runoff. I feed every watering. EC should be just a little higher than input but less than 300 microsiemens. Your additives may add a little EC so you might have to play with that part.
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I wouldn’t advise this with coco Growmie, coco should remain damp, most including myself feed daily. Coco can become hydrophobic very easily if allowed to get dry. I would recommend daily fertigation or at least every other day. Soil is different and does well with a drench to dry routine
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Everyone is right about the coco, it is a soiless (hydroponic) medium that likes to be wet.
But…
Castings were mixed in, right?
Depending on the amount of castings it turns basically into soil, no? Worm castings and coco don’t warrant traditional coco scheduling. 
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Not watering coco every day leads to a high ppm level and burns leaves. I have learned this the hard way. And coco can look wet but not have any water available to the plant. Its like a sponge that has been squeezed out, sure its wet still but the water is trapped in the fibers and not available. Been growing in coco for 3 years now and I ignored all the common advice until I had problems. So water and feed daily, pH to 5.8.
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Worm castings was maybe 15% of mix it’s still very much just a coco and perlite well it drains like one anyway
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guess your right need that part of the equation too.
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This is where it’s going to be weird…
I always wondered why people did these additives. Really gotta pick a lane here. Either full hydroponic or regular soil…
If you want a combo of perks from each generally peat is the go to.
Once you start playing with additives it can change things and make it more difficult to manage for no reason.
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Winner winner Brother, Keep it simple and less is best
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furthermore does coco support soil biology in the worm castings to break down the organics? just curious since I don’t have the answer.
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The point of worm castings is microbes. In coco I have not seen any benefit to adding microbes. The point of microbes is to break down organic matter into food. We feed coco every watering and there is no matter other than coco fibers to break down. I would guess those break down very slowly. And since we feed every watering even if they did break down organic matter it would be a tiny addition to the nutrients available.
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Never tried top dressing coco due to daily feeding and liberal run off. Instant feed and run off makes it easier to manage the root zone IMO
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Yea I’ve pretty much just absorbed information from many different sources in anticipation for this venture haha ummmm should I transplant to coco perlite no worm castings and feed hydro nutes?
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