New growth appears yellow to me. I know new growth is light green but this is borderline to me. I assume a Magnesium deficiency, I am using RO water. I just flushed and watered 3 days ago. Should I water with a cal/mag supplement immediately or wait until the soil dries out?
7 SSH
Flipped to flower 2 days ago.
Topped 1 week prior to flip.
Started in light warrior.
Currently in 5 gallon fabric pots in FFOF
Under 2 SF4000 LED at 24" at 60% dimmer.
RO water
PH 5.5 (a little low I know)
Temp 70
RH 55
Oscillating fan.
3- 4inch inline fans bringing in fresh air, with carbon filters. 190 cfm each
1- 8 inch exhaust fan. 750 cfm
Lady bugs for protection.
The larger phenos were given FF nutes in the beginning and it burned them. But I think we have recovered. The 2 shorter phenos (I assume NL phenos) haven't been given anything since go.
Also any advice talking me through light burn would be helpful. These SF4000's put out some serious light. I cant splurge on a good ppfd meter right now and customer support from Spider Farmer is horrendous. Phone doesnt work and email correspondence is from China and fluency in the English language is poor. The manual doesnt suggest a setting for the dimmer only height. I am getting 120,000 lux at 24 inches at 100%. Some of the symptoms I'm seeing is yellowing at the top, tips burnt, a glossy sheen on some parts of fan leaves, and curling of the edges of the leaves. It's hard to tell if any of this is from the early nute burn, or too much light intensity. I have found a guy that tests these lights and he states that at 100% at 24 inches, that board puts out 840 umols. I know this light level is adequate for flowering but that doesnt mean the strain can handle it? Or can it?
7 SSH
Flipped to flower 2 days ago.
Topped 1 week prior to flip.
Started in light warrior.
Currently in 5 gallon fabric pots in FFOF
Under 2 SF4000 LED at 24" at 60% dimmer.
RO water
PH 5.5 (a little low I know)
Temp 70
RH 55
Oscillating fan.
3- 4inch inline fans bringing in fresh air, with carbon filters. 190 cfm each
1- 8 inch exhaust fan. 750 cfm
Lady bugs for protection.
The larger phenos were given FF nutes in the beginning and it burned them. But I think we have recovered. The 2 shorter phenos (I assume NL phenos) haven't been given anything since go.
Also any advice talking me through light burn would be helpful. These SF4000's put out some serious light. I cant splurge on a good ppfd meter right now and customer support from Spider Farmer is horrendous. Phone doesnt work and email correspondence is from China and fluency in the English language is poor. The manual doesnt suggest a setting for the dimmer only height. I am getting 120,000 lux at 24 inches at 100%. Some of the symptoms I'm seeing is yellowing at the top, tips burnt, a glossy sheen on some parts of fan leaves, and curling of the edges of the leaves. It's hard to tell if any of this is from the early nute burn, or too much light intensity. I have found a guy that tests these lights and he states that at 100% at 24 inches, that board puts out 840 umols. I know this light level is adequate for flowering but that doesnt mean the strain can handle it? Or can it?