This is my first grow and I’m learning a lot! This is about a 8 week Northern Lights Autoflower. The leaves were a perfect green until last week. That is when I noticed the leaves getting darker and I’m concerned that I might have a nutrient issue. Any advice on if this is normal coloration for this strain?
I agree with oldguy on all! Do you have any runoff #s or results of a soil slurry? Also looks as if the light intensity is rockin’ hard on that top cola or it could be genetics! What type light do you use?
I don’t, but I know my PH needs to be lowered. My soil measurement PH is around 6.8-7.0, which is higher than I would like. I’m using a Spider Farmer SF-1000 LED Grow Light Use with Samsung LM301B LEDs. It puts out a ton of light and not much heat.
Could be @Holmes@PP3121. I’ve kept a consistent 8 to 10 cm distance from the top of the plant. Doing some rough math on my light it looks like I’m well over the recommended lux or umol for the flowering stage. I’ll definitely be raising it now. I started this one before I knew about SCROG or any of the techniques for spreading a plant out to maximize it. The more I have learned the more I have been geeking out about all of the technical aspects of growing. Thank you for the advice!
You are welcome, that is one of the reasons we are all here! The other is because we like it so much! If you will fill out a support ticket and get some pics. of your setup we can help you tweak it or maybe see a potential issue before it is an issue! Also most plants will cannibalize themselves in the late stages, if you do not have a scope or loupe to check Trichomes now would be a good time to get one!
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Sorry for the delay. The winter storms have been hell. Sorry for the picture quality. It is tough to take these without shaking or touching the plant.
What strain, Seed bank, or bag seed: Northern Lights Autoflower, NTH-FAP5, BIN: 04:03:02 16850904
Method: Organic soil w/ 10-3-1 Bat Guano
PH of Water, Solution, runoff (if Applicable): measurements have been between 6.9 and 7.2, ordered pH down to lower it
PPM/TDS or EC of nutrient solution if applicable: n/a
Indoor or Outdoor: Indoor
Light system: Spider Farmer SF-1000 LED Grow Light Use with Samsung LM301B LEDs
Temps; Day 73 F, Night 78F (averaged)
Humidity; Day 31%, Night 31% (averaged)
Ventilation System; Yes,
Ventilation Size: VIVOSUN 4 Inch 195 CFM Inline Duct Ventilation Fan Vent Blower with VIVOSUN 4 Inch Air Carbon Filter Odor Control with Australia Virgin Charcoal for Inline Fan, Grow Tent Odor Scrubber, Pre-filter Included, Reversible Flange 4" x 14"
AC, Humidifier, De-humidifier, nothing dedicated, manually misting to increase humidity
You need to take pics of the calyx instead of the leaf! The leaves will mature faster and are not an accurate representation of bud maturity! Nothing easy about this until you do it a bunch and then you will see how easy it is to grow a “weed”.