Need help diagnosing an indoor coir grow

Hi folks,
This is my first time growing in Eco Earth coco coir. I started 5 plants from bagseed in small cups with drainage holes. They have all been transplanted to 1-gal pots filled with coir up to just below the cotyledons. I used 1/3 teaspoon of Fox Farms Big Grow 3-6-2 Hydro with about a quarter gallon of water to each plant. I can't measure pH until I can get a meter. My schedule has been nute water nute water. I'll feed, let a day go by, water, and repeat. I'm leaning toward nute burn or a magnesium deficiency but I may even have over-watered; the leaves are yellowing slightly at the ends and tips and are mostly curling up. The cotyledons are pale green to yellow and are either drooping or standing up. The leaf tips on one plant are a brownish gray and very brittle.

I am using 4 1600 lumen 6500K CFLs and they aren't too close or far from the lights. On my healthiest plant I'm not seeing the yellowing but I see at least a few brown spots. These have been growing for over 7 days and are just now starting on the 3rd set of true leaves. On one of my smaller plants new growth is kind of miniaturized and twisting. I'll post pictures when I can. I've been trying to follow the flow charts and other threads but I feel like I'm seeing too many symptoms together to pinpoint a cause.

This is before I had enough coir to fill my containers. The plant at the bottom right is the worst though and you can see the darkened wilted looking tips. They're all filled to about 2" from the tops of the containers now.

If ur watering every day u got a problem. I would flush them and give them only water for a week and see if the problem corrects itself

you are probably over nuting and over watering. at the stage they are in you should not have to give them nutes any more than once a week and only at 1/4 strength, half at the most. only water when the soil is unmistakably dry on the top layer and never feed nutes if the plants are dry, give some water first then finish with nutes.

Thanks, I'll flush tonight. I think I've fed twice so far and didn't start until the first set of leaves was nearly finished. You think they'll be OK flushed and on straight water for a week? And if there is a nute deficiency during that time do you think it would be safe to foliar feed something light? I was thinking of using a little FF Big Bloom.

I would keep them on strait clean correctly ph'd water ( 6.0-6.2 should do nicely) a light ff probly wouldn't hurt but give them at least a few days without any nutes. curious, whats the npk on the Big Bloom?, they will need mostly N right now, not so much P and K.

Big Bloom is .01 - .3 - .7.

I would definitely NOT ff those babies with that. that is a chemical fert designed for large developed plants in bloom, you could easily kill them with that!

if your going non organic I would recommend a nice all purpose like Maxsea 16-16-16, and only use at 1/4 strength

I got home and flushed tonight. Here's some pics of their current status:

the one in the first pic looks ok, I would let the soil dry then add water only with ph @ 6.2. the other two don't look so good, do you have any superthrive? I think that would help right now, just a drop to a gallon of fresh ph'd water next time soil is dry.

Can anybody give any opinions or info on my grow thanks.

hmmmm opinions or INFO on YOUR grow...........? just curious, are you asking for opinions on how they look or do you not know their lineage or where they came from? Looks like a sativa dominant strain that has elongated internode spacing obviously in early stage of flowering, looks like they could have used a transplant a ways back, is this a light depp? looks like they may not have got as much light as they wanted during veg, but overall look nice, healthy and happy can YOU tell ME anything about this girl? she just turned nine weeks old yesterday.

your soil is too hot. flush it out good

Well, here's everyone a week after flushing and stopping with the nutes. Much healthier, thanks!



does it look like I still have any problems?

In case anyone is actually following the thread, the plants all pulled through after my abusive over nuting and over watering stopped. I think everyone seems to be showing female preflowers. I also think just one of these is sativa dominant but I'd appreciate another opinion on that.



I will be switching to 2700k mixed with a couple blues and 12/12 lighting in the next week.

Just for reference i use 1/8 tsp in about a full gallon of water of a 3 5 3 for that age evry other or every third feeding. Oh and coco is hyrdo based not soil based (even if it looks like dirt its not) ph is best in the 5.6-5.8 range

And yes sativa dominant by far



Alpha... Your indica beast is making my heart pound thinking about being able to have that amazingness outdoors.