Problem at 3 week of veg coco coir

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larson181

New Member
Coco coir perlite mix 70/30 , RO water , from seed exactly 31days now , i started with solo cups and 11 days is in this pots... I toped them 3 days ago. I use advanced nutrients perfect ph sensi coco ec 1.3-1.5 now , temperatures around 22-23 celsius during day and 18 celsius at dark period. Light intensity 500 ppfd now , spider farmer led . Humidity around 60-70%
I also use mycorrhiza orca and add some drops of bio heaven biobizz . I think i made some mistakes...
Last 2 times added biobizz cal mag to my nutrients and i m suspicious that this cause the problem because it seems expired , smell little bit bad. But i gave it...also i used to sprayed them with tap water often in order to increase the humidity ... Its seems to me some kind of deficiency. Last time i feed them untill run off ... Today i bought cal mag from advanced nutrients and i spray straight to the leafs , dilution 2 ml per litter . They react good but the problem still exists and its visible. I hung also above a small co2 bag.
What can i do to solve it ??
Any suggestions ?;-);-)
 

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Wastei

Wastei

Well-Known Member
larson181 said:
Coco coir perlite mix 70/30 , RO water , from seed exactly 31days now , i started with solo cups and 11 days is in this pots... I toped them 3 days ago. I use advanced nutrients perfect ph sensi coco ec 1.3-1.5 now , temperatures around 22-23 celsius during day and 18 celsius at dark period. Light intensity 500 ppfd now , spider farmer led . Humidity around 60-70%
I also use mycorrhiza orca and add some drops of bio heaven biobizz . I think i made some mistakes...
Last 2 times added biobizz cal mag to my nutrients and i m suspicious that this cause the problem because it seems expired , smell little bit bad. But i gave it...also i used to sprayed them with tap water often in order to increase the humidity ... Its seems to me some kind of deficiency. Last time i feed them untill run off ... Today i bought cal mag from advanced nutrients and i spray straight to the leafs , dilution 2 ml per litter . They react good but the problem still exists and its visible. I hung also above a small co2 bag.
What can i do to solve it ??
Any suggestions ?;-);-)
Click to expand...
There's very little gain in adding a Calmag product on top of a formula specifically made for Coco coir. It can cause nutrient excess and pH out of range.

Another problem with Biobizz Calmag is that its organic with very little to no pH buffer capability compared to a product based on nitrates and/or carbonates.

You solve it by stop mixing organics with mineral salts and feed the Coco coir base formula from start to finish. I'm further along than you are in coir and I'm only feeding 1.0 EC 3 times a day.

Temperature is too low for proper growth rates.
 
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larson181

New Member
3 timers per day during veg ?? Sounds too much. I imagine you giving them few ml each time , right ? Or untill runoff ?
 
Wastei

Wastei

Well-Known Member
larson181 said:
Thank you for your answer :) So now i need to wait for the pots to dry and then to add only advanced nutrients and not organics.
And to rise the temperature little bit.
So you think it can be solve
Click to expand...
You should never let the pots go dry growing in Coco coir. Try to elevate the pots so they don't sit in runoff water. I have my setup with two low storage containers in the bottom to catch runoff water and the pots stands on a grill/mesh to never sit in runoff water and get aeration all over the pots.
 
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larson181

New Member
My pots have something like hills , so the water is free to run . So to feed even if the pot is still heavy ?? I will not let it totally dry ofcourse but not to be heavy . Previous time i weight a pot with dry coco pellite to see how much is it , it was 740 grams with the pot. Then i weight the pots with the plants. The extra grams is the fertilizer and little bit the plant. When i saw the scale goes to 800 grams i fed them again.
 
Drop That Sound

Drop That Sound

Well-Known Member
Coco is an inert "hydroponic" soil-less medium, so there are no microbes or other organisms to help break down organic matter or additives, or support fungal/mycelium colonies either. It's not like soil at all. Probably best to flush out those extra products you added, and stick with your base nutrients.

You can't really over water it as long as you have the pots raised enough to get proper runoff. Coco coir still holds plenty of oxygen for the roots (almost the perfect ratios), even when saturated at the maximum field capacity. The more you water, the more fresh oxygen is also pulled in. You would pretty much have to completely submerge the pots down in non aerated solution to drown the plant..
 
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larson181

New Member
Ι flush them with tap water (maybe wrong ) and giving them this time their right nutrients .
The water (run off) was brown and became clear.
I wait untill runoff stop and gave them only advances nutrients
 
dwc420letsgo

dwc420letsgo

Well-Known Member
Wastei said:
You should never let the pots go dry growing in Coco coir. Try to elevate the pots so they don't sit in runoff water. I have my setup with two low storage containers in the bottom to catch runoff water and the pots stands on a grill/mesh to never sit in runoff water and get aeration all over the pots.
Click to expand...
Well, the first time after transplant is a good idea to have a bigger dryback to allow the roots to expand and fill up the container
 
Wastei

Wastei

Well-Known Member
dwc420letsgo said:
Well, the first time after transplant is a good idea to have a bigger dryback to allow the roots to expand and fill up the container
Click to expand...
Roots follow the flow of water in a hydroponic setting. In Coco Coir a big dry back will only cause a heavy EC spike and pH being out of range. I still say drybacks are for soil grows, not hydro.

If you have a problem with over watering and/or lack of oxygen growing in Coco Coir you've chosen the wrong pot size for the size of plant you're transplanting.
 
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