So I am day 8 from sprouting Here is my set up: Seeds: 3 auto white widows from Sensi seeds Light: Viparspectra 600w LED Medium: coco coir 70% perlite 30% Container: 11l fabric pot Also in a grow tent 80x80x200 Inline fan and fan with carbon filter, with a desk fan to circulate air better. Using general hydroponics trio and calmag for nutrients. Although at moment i am just using calmag and an 1/8 of the recommended nutrients (I use a feed chart someone with much more experience made). So all seems fine so far. Just on the second set of leaves, but the other day I noticed a small brown spot on one of the leaves. I didn't think much of it, thought it could have been a water droplet that has dried, but today it seems to have spread on the leaf. Any advice would be swell. It is only on one, I will put a picture of another as comparison.
I just thought as coco coir has no nutrients that they need something. Something like 0.6-1.4ml per gallon using the GH trio. And 5ml of calmag. I did read a lot about putting no nutrients, but that seemed to apply more to soil mediums. Still the other two plants look pretty good. It's just the mark on the one plant. Is this an error I made? I had a electronic ph reader at first and did my first watering with it. Found out the day after (using strips) that my ph reader was way off due to the high maitenence involved. (think the water on my first feeding was definetly under 4.5 ph) let it dry out though and have watered twice since, just in a small circle around the plants. I noticed a little slowing of growth, but has got back up to speed in the last 3 days or so.
I’m also in coco I burned mine with to many nutes to early I still give no where near the recommended dose and I’m 9 days into flower
You are correct that coco has to be feed as soon it gets its real leaves. Coco can also cause issues with magnesium and calcium. That is why there are Coco specific nutes to help keep your grow in line. Sent from my LG-H873 using Grasscity Forum mobile app
What is your pH going in and coming out? I suggest you feed 1/4 strength nutes to run off and never use plain water. Also consider using the Lucas formula for coco - 6ml micro and 9ml of bloom - no grow at all.
Well my way of measuring is checking two colours on a stick but I would say very comfortably around 6.0 probably just under. I haven't actually checked what it is coming out the other side, but a did get some good quality coco coir in a 50l bag. A question; wouldn't feeding it nutes every watering eventually lead to salt build up in the coco, even with the runoff? All my information does come from various forums and diaries, so I am merely repeating what I have read for the time being, I just read that it is good to water with ph'ed water every other watering so the nutrients don't build and cause issues down the road.
Always feed and keep the coco wet. I actually feed 3x a day on a timer. If the coco does not dry out and you have good runoff the salt won't build up. I don't flush until the end of my grow. Sent from my MotoG3 using Grasscity Forum mobile app
i agree with phil, gotta keep the coco moist, you can go every other day but lighter feeding more frequently is the way to go in my experience. also if you dont have an accurate way to measure ph, look in beneficial bacteria, like mykos and akos or great white, there are tons of options but that will help buffer the coco and allow a wider range of tolerance and keep it the ph in check
I wait a week after plant breaks soil before I give nutes and when I do I just give seaweed extract for 2 weeks
The same plant is showing different issues now. No idea what it could be or why it isn't affecting the other 2.