Is my plant doomed?

[Arsenicum]

This is my 6 week old NL auto I've been growing. Everything up until a few days ago has been going great, last few weeks my plant has been growing like crazy, but Tuesday morning I noticed some bronze colored spots appear on the middle and some of the upper leaves basically overnight. The plant was also looking a little off color. I have an inkling this is a phosphorus and or calcium deficiency. I gave the plant some worm casting based fertilizer and a calcium foliar spray. The affected areas got worse, newer growth and growth at the very bottom look better, greener.

I'm embarrassed to say that I haven't been feeding the plant very actively up until now. My growing mixture had some pretty rich soil mixed in to it and I thought that that might be enough for a while... my mistake. I made a post here like a week ago with the same plant, it was looking a lot better then.

Hope to hear something from someone more experienced. I hope the prognosis isn't too grim.

 

[Marq1340]

This is my 6 week old NL auto I've been growing. Everything up until a few days ago has been going great, last few weeks my plant has been growing like crazy, but Tuesday morning I noticed some bronze colored spots appear on the middle and some of the upper leaves basically overnight. The plant was also looking a little off color. I have an inkling this is a phosphorus and or calcium deficiency. I gave the plant some worm casting based fertilizer and a calcium foliar spray. The affected areas got worse, newer growth and growth at the very bottom look better, greener.

I'm embarrassed to say that I haven't been feeding the plant very actively up until now. My growing mixture had some pretty rich soil mixed in to it and I thought that that might be enough for a while... my mistake. I made a post here like a week ago with the same plant, it was looking a lot better then.

Hope to hear something from someone more experienced. I hope the prognosis isn't too grim.

You're being a little melodramatic with "doomed"

Give these guys more information on your grow.

Plant type, age, grow medium, watering method, feeding method.

My opinion is they've either been underwatered or over-watered with possibly other problems.

 

[tstick]

I'm willing to bet it's a pH issue and not a nutrient issue. My guess is that your pH is very low.

My advice is to get a pH test kit and do both a runoff and a slurry test. You could get a pH pen, too, but a decent one is expensive. I know I get criticism for recommending a runoff test, but it saved my grow...General Hydroponics is the one I use. If indeed it IS a pH issue, then you will have to leach the pots with pH-adjusted water until you get a runoff that's in a better range. It could take a couple weeks before your plants will bounce back. Once the pH is back on-track, then you will have to be sure and adjust your pH on everything you give it from there on out.

 

[Arsenicum]

You're being a little melodramatic with "doomed"

Give these guys more information on your grow.

Plant type, age, grow medium, watering method, feeding method.

My opinion is they've either been underwatered or over-watered with possibly other problems.

it looks scary.
as for more information:

Plant type - Northern Lights autoflower that i got from RQS
Age - sprouted exactly 6 weeks ago
Grow medium - about 75% peat moss with the rest being potting soil.
watering method - I water them about 2 times a week, letting the soil dry out before each watering.
feeding - vermicompost for tomato and peppers like once a week from now on

 

[warble]

I would say the nutes your soil have might be done. Some worm castings could help. Since you're going into flower, you might need to up the P and K they are getting fed.

 

[big bud man 413]

Have you called DR Green thumb?

 

[Greenman68]

from the collage of leaf coloring, it's probably a ph issue rather than individual nutrients, esp considering you just added ferts. you can top dress with fast acting dolomite lime to get it back in order.