please look at theese seedlings--need advice ASAP

[tactical420]

hey guys, take a look at theese. they are lowxak47. they were started about 2.5 wks ago. they had been under a t5 8-light placed about 6 in above them. they sprouted super-fast, but I think they have been too heavily watered. just put the 1000 hps over them 5 days ago. there has been significant growth, but I still have the leaf curl downwards only now i notice they are cupping. new to this so any info is helpfull. the temp is 84.5 and humidity is 40%

 

[bobman]

looks like overwatering.

 

[Boneman]

They dont look too bad. Water once a week. Are you using any nutes? What kind of soil?

84/40% is hot and dry. Maybe add a bowl of water in the room to raise humidity a bit

 

[NewGrowth]

hey guys, take a look at theese. they are lowxak47. they were started about 2.5 wks ago. they had been under a t5 8-light placed about 6 in above them. they sprouted super-fast, but I think they have been too heavily watered. just put the 1000 hps over them 5 days ago. there has been significant growth, but I still have the leaf curl downwards only now i notice they are cupping. new to this so any info is helpfull. the temp is 84.5 and humidity is 40%

You called it the roots are oxygen starved, what kind of hydro set up are you running?

 

[NewGrowth]

They dont look too bad. Water once a week. Are you using any nutes? What kind of soil?

84/40% is hot and dry. Maybe add a bowl of water in the room to raise humidity a bit

84F is a little hot but the humidity is just fine, don't add bowls of water to your grow area it just promotes pathogens (mold, bacteria, ect.).

 

[tactical420]

ok- here's more info. they are in 4" rockwool cubes. just gave them their very first nutes. using advanced micro 3 part program with advanced b-52. only mixed this first go at 300 ppm. watered them sunday. using ebb and grow system with 3 gal pots. soakedthem for 10 mins, then drained. checked the cubes daily, they are STILL wet. you can see the hydroton packed around the cubes. maybe should have used the 1" cubes for this, but it is too late to turn back. thinking about taking the cubes out of the buckets and trying to get more air to them to speed up drying. What do ya'll think should be done?

 

[tactical420]

also, say you watered the cubes on sunday,then did not water again for 5 days but the cube stayed wet, will the ph of the nutes in the cube rise much? when they were watered, the ph was 5.5

 

[NewGrowth]

ok- here's more info. they are in 4" rockwool cubes. just gave them their very first nutes. using advanced micro 3 part program with advanced b-52. only mixed this first go at 300 ppm. watered them sunday. using ebb and grow system with 3 gal pots. soakedthem for 10 mins, then drained. checked the cubes daily, they are STILL wet. you can see the hydroton packed around the cubes. maybe should have used the 1" cubes for this, but it is too late to turn back. thinking about taking the cubes out of the buckets and trying to get more air to them to speed up drying. What do ya'll think should be done?

You don't want to disturb the roots leave them in the system and use some H202 as well to help oxygenate the root zone. 5ml/L of 50% H202. You are correct about over saturating the rock wool this is a common mistake. How often are you flooding your system? Back down on the watering and don't allow the rock wool to get wet just damp. Let them dry out (a fan might help this) and add the H202 on your next watering, they should recover. Keep us updated! Good luck

 

[tactical420]

can't tell ya how much I appreciate the info-keep it comin' guys.

 

[tactical420]

any reccomendations on how high up I should be flooding the cubes? they are set at about 75% covered now at flood.

 

[NewGrowth]

any reccomendations on how high up I should be flooding the cubes? they are set at about 75% covered now at flood.

About an inch up the cubes should be adequate but with plants this small you probably only need to flood once a day or maybe even once every other day. They need time to dry out a bit in between flood cycles that how a flood table oxygenates the root zone.

 

[Zhu]

any reccomendations on how high up I should be flooding the cubes? they are set at about 75% covered now at flood.

75% is wayyyy to high imo, I would say 25%. lets the roots know they are supposed to go down for search of water and also doesnt drench the rockwool. flooding to high is probally your problem. I would let those guys dry out for a few.

 

[sllik]

25% is the best

picture worth thousand words

 

[TGFW21]

over watering , cut back on the wateing time