My plants were growing so nicely and then this happened!! I used neem oil for the bugs but used it late evening as to not burn the leaves. The following day I added nutrients and now this is happening 
ph is about 6.5 getting ready to test for NPK 
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It appears you might have an uptake problem. Your roots might not be doing their job properly. Iām hesitant to give advice on potted plants not in fabric. If it were my plant, Iād flush her well. Then I would immediately feed her again.
We could use more info. I agree with @oldmarine - it looks like you may have a PH problem (the most common reason your plants will stop absorbing nutrients properly) or some other form of lockout that is stopping uptake. That, or your soil is deficient now in maybe one or two different nutes.
I highly recommend filling out one of these:
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Following along
- What strain, Seed bank, or bag seedātall plant is Black Widow and the others are skywalker OG; seeds came from ILGM
- Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNFāorganic soil (coast of Maine Stonington Blend)
- Vessels: Pots, Grow beds, Buckets, Trothsā5 gallon buckets with drain holes on lower sides and bottom
- PH of Water, Solution, runoff (if Applicable)ānot sure; I tested the soil and the ph was 6.5
- PPM/TDS or EC of nutrient solution if applicableānot sure what this means but I did feed them once with Jackās 20-20-20 a few days before all this happened
- Indoor or Outdoor- outdoors
- Light system- natural sunlight
- Temps; Day, Nightā75-92
- Humidity; Day, Nightālots of humidity. I canāt control Mother Nature and live in a humid environment
- Ventilation system; Yes, No, Sizeānot sure-they are outside
- AC, Humidifier, De-humidifier,- no
- Co2; Yes, No- no
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The plants weāre doing well and then I used neem oil for bug control. The following day I used jacks 20-20-20 for the first time. I feel like I gave them too much nutrients 
however, I fed with half the recommended dose. They were flourishing until this happened. Iām thinking the soil blend was plentiful and I didnāt need anything additional. How do I flush them. I really want to be able to salvage my plants
Iām willing to bet money this is where your problem lies. Find an EC/TDS meter. This device measures the total dissolved solids in your plantās runoff water and will give you an idea of what the nutrients in the soil look like. For example, if the reading is sub 500 ppm (parts per million), your plant will need more nutrients. If it goes above a certain number of PPMs, you have a serious problem with too many nutrients (hence lockout and/or nutrient burn and uptake issues). The āaboveā number actually varies quite a bit from plant to plant - Iāve got one plant that likes it in the 2400ppm range and others that donāt want more than 1200-1500ppms. Other people on the forum have had successes over 3k but I get nervous of nutrient lockout in that realm.
A good TDS/EC meter is going to come from Apera, BlueLab, or another reputable company. However, anything will do in a pinch - some folks use the cheap ones off Amazon with some success and frequent calibration - I broke my $6 cheap one from Amazon in about 2 weeks, so it served itās purpose but Iām much happier with my BlueLab.
Get a bunch of distilled water - water them with 3x the amount you ordinarily feed them and give them a day to recover. Itās a stressful (albeit minorly ) endeavor for your plants and they will probably look sad for a little bit after the flush. They should perk right up afterward though - 24 to 48 hours.
disclaimer there are probably pros who have done this more than I have who may offer different guidance. Follow their advice if it conflicts with mine. Iāve had to emergency flush about 3 times so not a whole lot of experience yet in that realm.
I seriously recommend getting a meter to check your PPMs though - itās an invaluable tool when you start to feed nutrients (making sure youāre putting in what you think youāre putting in) and check runoff.
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Flush is just that, youāre flushing the soil of all nutrients. I would use about 3 gallons of plain neutral water (ph 7ish) per gallon of medium. Once you finish flushing you should refeed the plants immediately. Donāt wait for the plant to ādry outā.
Edit: Take it slow when flushing. You want to saturate the pot before it starts running off. Remember, youāre trying to remove all the nutrients, contaminants or whatever.
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I did try flushing yesterday but I donāt think I used enough water. Iāll do it again today. Should I wait until the evening when the sun goes down? Will that make a difference?
At this point you need to weigh the risk. Ultimately itās your decision what you do. You could do everything I said and still lose her. If you donāt do anything else she could survive.
Youāre Johnny on the spot so to speak. Good luck.
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I think Iām just going to pray and leave her alone Iāll let you know in a couple days what it looks like. Thanks for your input 
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Just remember to watch the new growth and not the leaves that are already damaged. The spotting very likely wonāt go away, but as long as new leaves are growing in happy and healthy, youāre back in safe territory.
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So I did a soil test. The ph is perfect. However, the N is really low, P is high, and K is high. Any suggestions??
Or should I just pray for the best?
What do you have on hand in terms of nutrients?
