Problems in coco coir 20 day old seedlings not growing

KidGrower · Jun 23, 2024

Ive been having some trouble with these seedlings that im growing in coco coir the first couple days until they sprouted i gave them just water and then a week later i started giving them jacks 5-12-26 at 2 grams a gallon which put my ppm to around 600-700, ive only been giving them around 100-150ml of water every day and when i kept seeing them droop i gave them more water until i got 10% runoff just to see what would happen. Ever since the 14th of june they have been drooping everyday and not growing any big leaves or expanding like it should.

Stokes · Jun 23, 2024

If theyre out side try putting them in the shade. You have to remember that when they first start out they will be exposed to less light as the surrounding plants will be already more established and collecting the most light. If a plant has all the light they need for growth from the start then they have no reason to grow and compete for it. The area theyre growing in will also be more moist.

I never start seedlings outdoors. But if i did, i would try to make sure their roots stay cooler and the moisture didnt evaporate as quickly , even if that mean digging holes and putting the cups and all in earth.

Beachbumm · Jun 23, 2024

KidGrower said:
Ive been having some trouble with these seedlings that im growing in coco coir the first couple days until they sprouted i gave them just water and then a week later i started giving them jacks 5-12-26 at 2 grams a gallon which put my ppm to around 600-700, ive only been giving them around 100-150ml of water every day and when i kept seeing them droop i gave them more water until i got 10% runoff just to see what would happen. Ever since the 14th of june they have been drooping everyday and not growing any big leaves or expanding like it should.

Too dry

PlumberSoCal2 · Jun 23, 2024

You should be watering (fertigating actually) 3-5 x's a day with a weak solution, say 1/4% at this point. 1st week water, wk 2-3 1/4%, 4-5 1/2% 6+ through vegg full strength.

I don't know when this craz started of treating coco like soil but it's not soil. It's basically a hydro grow and you're the timer, unless you want to set up pumps and timers and have somewhere for the waste water to drain.

RootFarmer · Jun 23, 2024

Yea they are too young for full sun not to mention heat issues. Indoors in a temp controlled environment under sufficient light would be better. I like my seedlings at about 65-ish. More heat leads to more water loss through leaf tissue which can lead to over watering bc you see wilting in heat and assume they need a drink. Their roots are just starting to grow. A little goes a long way right now. Right now I'd focus on giving them what they need for rapid root growth. You can't go wrong with kelp meal or seaweed extract right now. It will provide important things they need like vitamins (B-1), amino acids, growth promoting hormones, trace minerals, etc., without overloading them with a lot of nutes. A starter or transplant fertilizer is an option. The NPK is formulated similar to flowering nutes so could work in a pinch. I water my seedlings with a spray bottle for the first 3-4 weeks. Water a little and wait a little. See how they respond.

Stokes · Jun 23, 2024

PlumberSoCal2 said:
You should be watering (fertigating actually) 3-5 x's a day with a weak solution, say 1/4% at this point. 1st week water, wk 2-3 1/4%, 4-5 1/2% 6+ through vegg full strength.

I don't know when this craz started of treating coco like soil but it's not soil. It's basically a hydro grow and you're the timer, unless you want to set up pumps and timers and have somewhere for the waste water to drain.

Only person i saw do it that didnt have to was mr canuk. He did it very well but could have done much better with organic soil or just committing to coco and doing it the right way.

Ive done a couple grows with treating it as soil. Even being a somewhat experienced grower i struggled a little managing dryback. You can adjust your mix to retain moisture. Unless you were in an area like the UK and subject to peat bans i would never ever recommend it, for quality or for yield. Too much work trying to keep the environment optimal for microbes. If someone wanted to do it for a challenge and could attain large yields i would shake their hand. That would be the only logic i would see doing it lol

40%-50% coco mixed in with peat is the absolute shit tho.

ArtfulCodger · Jun 23, 2024

I run Jack's 3-2-1 in 100% coco. The "3-2-1" refers to the proportion of 5-12-26, calcium nitrate, and epsom salt. Originally, the recipe was 3 grams per gallon of the 5-12-26, 2 grams per gallon of calcium nitrate, and 1 gram per gallon of epsom. That's been updated to 3.6g, 2.4g, and 1.2g. If you're not including calcium nitrate, you could be starving them for nitrogen.

Stokes · Jun 23, 2024

Oh. Sorry, missed where it was jacks

CityHerbs · Jul 10, 2024

The soil looks dry, would likely water them.

Bigger issue is the RH. Plants that small need high RH. I doubt they're getting that outdoors.

As others have said, the sun is likely too strong as well.

Problems in coco coir 20 day old seedlings not growing

Problems in coco coir 20 day old seedlings not growing

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