Hey, So i recently bought a HLG 260w LED (4000k) light setup. But im having major problems growing under them, and i cant really figure out why. Im growing Northern lights from bulk seeds. its an autoflowering strain.
Temp is stable at about 25-28C (77-82f)
Humidity is ranging between 60-80%, im trying to keep it lowered in the 4 hours of dark ive decided to give my plants daily.
Lights have been kept at 24-30 inches on standard power ( 250w from the wall)
Im using CANNA hydro vega, following the feeding chart on their website.
BcuzZ root stimulator and vitalink Calmag, GuardnAid Oxyplus.
So ive been following the feeding chart from canna`s own site, inputting the EC levels of my tap water so it should be fine. The thing is that when i add oxyplus, calmag and BcuzZ root stimulator i get elevated EC levels.
I have a 60L ( 15 gal) reservoir, im growing hydro. the feeding chart sais to start at 107ml A and 107ml B of the canna vega nutritient solution in total over the 15 gallons. This gave me an EC of about 1.2, this was exactly like the feeding chart said. Afterwards i added bcuczz root stimulator at 50% strenght according to the bottle, so 30ml in total on the 15 gal res. Then i added oxyplus also at about 50% if i remember correctly. And then i was told by someone experienced that with led lights i would get cal mag deficiencies because of the light spectrum from the leds, and that i should use calmag and raise the EC by 10% with it, raising the EC by 10% resulted in about 10-20ml of the calmag solution, wich is about 1/6th to 1/3rd of the strenght the bottle reccomends.
one or two days afterwards i started getting these symptoms shown in the first pic. Weird spots on the leaf, i thought it was a deficiency problem, and the plant was about a week old when this happened, and the feeding chart sais you can up to 130ml nutritient in about this part of the grow, so i did.
The next day the problem had increased. I looked up some topics on deficiencies and toxicities on the great interwebs and decided it looks like a calsium deficiency. I upped the concentration of the calmag to the strenght shown on the bottle, 60ml in total on 60l( 15 gal ) . this increased my EC to about 1.6-7 wich is very high ?Afterwards i found out that a mag toxicity can cause blockouts of calcium and show up as a calcium deficiency symptom.
The next day the problem was still getting worse, so i figured it is proboably a mag toxicity problem not a calcium deficiency, and flushed my reservoir and added only the base canna vega hydro nutritients. at 90ml total wich is below the feeding chart. This morning i upped it to 110 wich is according to the first early week of the grow in the feeding chart.
I feel like the problem might still be persistent. The latest pics are from this day and the yellowing tips of the bigger plant has occured today im pretty sure.
the smaller plant has become worse today aswell but im not sure if it has spread or if its just the already affected leaves showing more signs of the damage.
At this moment i have an EC of 1.0, water temp of 20c ( 68f) a ph of 6.4 ( the ph has always been at an acceptable level) a air temperature of 25c ( 77f) and a humidity at 75%. I have dimmed down the light to 125w, and it is hanging at 25 inches. I dimmed it down to 125w about an hour ago just because im scared the symptoms are actually coming from light burn, these leds have pretty impressing ppfd readings and even at 125w it should be giving about 600ppfd at 12 inches height. Im gonna link a review and ppfd test to them.
I have attached a bunch of pics. All of these are taken 3 or 4 days apart.
I might have fixed the problem already with the flushing, only base nutes and dimming down the light already, im not sure. I dont know how fast i should be seing results in the plant getting better ? But i am posting now anyways because some of you might have some good tips for me wich i can read tomorrow if my plants still show signs of worsening.
And if anyones wondering what im using instead of rock pebbles its something called flower foam, i cut it perfectly so the rockwool cube was just above the surface of the water and i think it worked out perfectly. I dont think this affects anything because the roots are not growing trough them at all .
Thanks in advance.
Temp is stable at about 25-28C (77-82f)
Humidity is ranging between 60-80%, im trying to keep it lowered in the 4 hours of dark ive decided to give my plants daily.
Lights have been kept at 24-30 inches on standard power ( 250w from the wall)
Im using CANNA hydro vega, following the feeding chart on their website.
BcuzZ root stimulator and vitalink Calmag, GuardnAid Oxyplus.
So ive been following the feeding chart from canna`s own site, inputting the EC levels of my tap water so it should be fine. The thing is that when i add oxyplus, calmag and BcuzZ root stimulator i get elevated EC levels.
I have a 60L ( 15 gal) reservoir, im growing hydro. the feeding chart sais to start at 107ml A and 107ml B of the canna vega nutritient solution in total over the 15 gallons. This gave me an EC of about 1.2, this was exactly like the feeding chart said. Afterwards i added bcuczz root stimulator at 50% strenght according to the bottle, so 30ml in total on the 15 gal res. Then i added oxyplus also at about 50% if i remember correctly. And then i was told by someone experienced that with led lights i would get cal mag deficiencies because of the light spectrum from the leds, and that i should use calmag and raise the EC by 10% with it, raising the EC by 10% resulted in about 10-20ml of the calmag solution, wich is about 1/6th to 1/3rd of the strenght the bottle reccomends.
one or two days afterwards i started getting these symptoms shown in the first pic. Weird spots on the leaf, i thought it was a deficiency problem, and the plant was about a week old when this happened, and the feeding chart sais you can up to 130ml nutritient in about this part of the grow, so i did.
The next day the problem had increased. I looked up some topics on deficiencies and toxicities on the great interwebs and decided it looks like a calsium deficiency. I upped the concentration of the calmag to the strenght shown on the bottle, 60ml in total on 60l( 15 gal ) . this increased my EC to about 1.6-7 wich is very high ?Afterwards i found out that a mag toxicity can cause blockouts of calcium and show up as a calcium deficiency symptom.
The next day the problem was still getting worse, so i figured it is proboably a mag toxicity problem not a calcium deficiency, and flushed my reservoir and added only the base canna vega hydro nutritients. at 90ml total wich is below the feeding chart. This morning i upped it to 110 wich is according to the first early week of the grow in the feeding chart.
I feel like the problem might still be persistent. The latest pics are from this day and the yellowing tips of the bigger plant has occured today im pretty sure.
the smaller plant has become worse today aswell but im not sure if it has spread or if its just the already affected leaves showing more signs of the damage.
At this moment i have an EC of 1.0, water temp of 20c ( 68f) a ph of 6.4 ( the ph has always been at an acceptable level) a air temperature of 25c ( 77f) and a humidity at 75%. I have dimmed down the light to 125w, and it is hanging at 25 inches. I dimmed it down to 125w about an hour ago just because im scared the symptoms are actually coming from light burn, these leds have pretty impressing ppfd readings and even at 125w it should be giving about 600ppfd at 12 inches height. Im gonna link a review and ppfd test to them.
I have attached a bunch of pics. All of these are taken 3 or 4 days apart.
I might have fixed the problem already with the flushing, only base nutes and dimming down the light already, im not sure. I dont know how fast i should be seing results in the plant getting better ? But i am posting now anyways because some of you might have some good tips for me wich i can read tomorrow if my plants still show signs of worsening.
And if anyones wondering what im using instead of rock pebbles its something called flower foam, i cut it perfectly so the rockwool cube was just above the surface of the water and i think it worked out perfectly. I dont think this affects anything because the roots are not growing trough them at all .
Thanks in advance.
