Nitrogen def?

masho95

Active Member
Nitrogen deficiency here? Sorry I'm not good at matching my plants to pictures online and it's another one of these diagnosis threads. :wall: One set of leaves is starting interveinal yellowing at the tips. Another set is yellowing near the stem perhaps making the veins seem greener than normal. Thanks for any input!

Seedling is 15 days old.
SF2000 LED light at 30" (thought that one brown burn spot might have been from too intense light, it's the only spot any of the 6 plants have.)
Mother Earth coco plus perlite mix
Temperature = 74.5-77 (as heater turns on and off)
RH = averaging about 50% (set to 60% but the humidifier can't get it that high unless i turn down the exhaust)
RH does have swings because the humidifier is empty by the time I get home and sits around 26% until it gets refilled.
Starting coco in these pots had a Dr. Earth 4-4-4 and some worm casting mix added in.
I checked the coco pH of this seedling this evening and it's at 6.6 so next water will be around 5.8 to lower it.

They've been watered almost up to runoff at a pH of 6.2 and about every 2 days after the first heavy water on 3/8. I watered light this morning and should be able to re-water tomorrow morning.

First full water on 3/8/2020
watered 3/10/2020
watered 3/13/2020
watered 3/16/2020


WT2_3_16_2020 (3).jpg
 
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Snoopy808

Well-Known Member
IMO thats a healthy seedling.
Its gonna want to be repot real soon!
Be careful with watering at 5.8 pH. Thats kinda low and can cause burn spots.
 

masho95

Active Member
IMO thats a healthy seedling.
Its gonna want to be repot real soon!
Be careful with watering at 5.8 pH. Thats kinda low and can cause burn spots.
Thanks, the yellowing is very very minor but if there was an issue I wanted to address it now instead of when it gets really bad. Especially considering I'm using slow time released organic fertilizers. Gave them a tiny sprinkle of some Dr. Earth bat guano this morning and watered it in at a pH of 6.0
 
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