They looking better!
Thanks dude! I hope I manage to keep this 3rd batch on the rails! When they're big enough to pot on, will move to 3 litre pots, again with the 50/50 perlite/coir mix. Wondering what impact a layer of compost on top of this might have, but maybe should restrain myself from experimenting further until I've at least got a basic method worked out and understand what is going on. My last two grows were so much easier than this one
the 2nd batch (mostly MSNL Blueberry regs, you can see one of them in the top right of the 2nd pic) are really unhappy in the compost/perlite mix, and have completely stalled - the new batch already overtaking them. Will probably cull the BB tonight to clear the space. Will keep flushing the remainder from the first batch with low pH water (giving a few days in between each time to dry out) & foliar feeding. They are grimly hanging on... will give them another week or two to see if they revive. Some plants there I really dont want to lose.
Don't use compost till you read and correct it's ph and maybe runoff it gives as well, if it's very high.
I mean you can't expect to add a little of a bad thing and end up better. At least check before.
I've noticed that there has been no mention of calmag. If you're using perlite coco mix and you're growing under a sf1000 you should be adding a little calmag to your feed, about half ml per litre.
Your past grows were fine.
Your only difference this time was your compost mix which probably caused PH lockout.
If your newest batch of babies growing in coco/perlite are pale they may be nutrient deficient if your solutions PH is correct going in and out.
Usually the number one supplement needed after NPK is calmag.
Here's a link to sick plants with a bunch of pictures for reference...
https://www.icmag.com/forum/marijuan...-pest-troubles
...
You could add epsom salts to bring up the level of Magnesium, but don't do what I did and start messing around with everything when it was working fine.
Try to repeat what you did with your previous grows that worked well.
Overthinking stuff never worked out for me.
I killed a lot of plants. lol
Calcium carbonate is not soluble in 7ph and above water but it is soluble in acidic water hence the build up in kettles and taps as domestic water supplies are normaly slightly alkaline. Coco coir will suck up the calcium and magnesium from ph adjusted tapwater, thats why you need to add calmag in coco coir. You need to satisfy the coco's need.
The runoff is getting better!
You should be able to water the coco/perlite plants much more often than you could water your compost-based mix…
What’s the temperature like in there? Just curious.
... I'm not used to watering so much that I get any runoff to speak of - but this is the preferred way with coco, right?