Help don't know what deficiencies I have

I have a small grow an a couple of the young plants have shown brown/rusty spots over the leaves and they are starting to yellow I'll attach pictures.
Any info would be appreciated

My advice would be to gain some knowledge through reading, classes, growing experience. It can be as hard as you want to make it but some underlying knowledge helps a lot. Right now you're getting growing experience. Grow some house plants too.
Don't feed it too much and don't over water.

Yellowing this early means you've either given them too much nutrient or your soil is totally barren. What kind of mix are you using and did you give nutes?
They look to be only 4-5 weeks old so they probably didn't need anything yet especially if your soil is fertilized. Looks like they are burned by nutes to me...that droop is from either too much/too little watering.
Dont soak the roots at this stage use a hand sprayer to keep the soil moist without soaking it in between waterings if needed.
It's better to start them in smaller size containers and then transplant more often. Fresh mix in a larger pot with plain old water feeds more efficiently than liquid nutrients. Save the nutes for late veg to mid bloom phase when they are needed.

What he said ^

Thanks guys

They only started week 4 today gave them b-vitamin from raw. they look like they are getting stronger again, may have been a magnesium deficiency. This is the others
I have been feeding them tap water since seed. they started in small pots like the size of a plastic cup. They got a very small feed on transplant to the air pots last week 1ml a litre plant magic oldtimer and watered till run off. Yesterday they got the b-vitamins alone no feed. The soil is also plant magic supreme plus.
Thanks again.

You burned the hell out of them. The claw and those spots...burnt.

It's the number one problem on grows: everybody thinks they should start nuking their plants with fertilizers from day one. Frankly, in a soil grow, if you have to give your plants ANY nutrients at all during the veg stage, you're doing it wrong.

Typically, it's around week 1 or 2 of flowering when the big growth splurt hits before I ever give the first dose.

Ca/Mg and pH issues - pHing your water?
Looks like that soil needs more Ca. Use a bottled ca/mg at 5 ml per gallon - pH to 6.5 and water

TacoMac said:

Y Frankly, in a soil grow, if you have to give your plants ANY nutrients at all during the veg stage, you're doing it wrong.

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Interesting opinion. There are folks who grow big and must feed in veg. In fact, if your running longer then 28-32 days on prepackaged soils like FFOF in any container before up potting. You best be feeding at that point (in your own words - "you're doing it wrong).....Heavy feeders - like GG#4 will respond better to feeding earlier..

what's the soil? whats's the feed? what's the water? what's the light? whats the light schedule?

I don't up pot. That's a waste of time, effort and material. I germinate the seed in a wet paper towel and plant it directly into a 5 gallon pot of regular potting soil with 10 tablespoons of lime and around 35 to 40% perlite.

Never had an issue an net around 5 ounces per plant on average.

Soil- plant magic supreme plus
Feed-plant magic old timer grow/bloom
Light- 600w duel spectrum
Light schedule- 24h autoflower, was on 18/6 though temp was dropping at light off as too the 24/7 right now.
Water ph- plain 6.8-7.0 feed water mix 5.5-6.5

I'd try plain water for a few days, trim those dying leaves. Looks like you over fed/burned them. Hopefully time to recover. If this happens in flower the plant is often fubar.

chemphlegm said:

If this happens in flower the plant is often fubar.

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What do you mean by fubar?

TacoMac said:

I don't up pot. That's a waste of time, effort and material. I germinate the seed in a wet paper towel and plant it directly into a 5 gallon pot of regular potting soil with 10 tablespoons of lime and around 35 to 40% perlite.

Never had an issue an net around 5 ounces per plant on average.

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I would have to disagree with you there. Maybe you see no benefit but I do. When you put a seed in 5 gal pots that tap root heads straight down instead out down and out. By repotting it allows the roots to spread out more instead of heading straight down. But to each his own, if your system works for you then kudos. Also how does repotting waste material? I reuse all pots and cups, you still add the same amount of soil and you use the same amount of fertilizer. It might be more time consuming but I'm not lazy so it's no big deal.

Jordan Steele said:

What do you mean by fubar?

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fuck up beyond all recognition fubar. It is old lingo from WW2 era.

fu·bar
ˈfo͞obär/
adjective
adjective: fubar; adjective: foobar

1. out of working order; seriously, perhaps irreparably, damaged.
   "the clock in the hall is fubar"

fucked up beyond all repair?

Right thanks for the info.

sheesh, so dude look like your torched them, sorry to say. It will take some time, but you center of the plant or main stem looks green and nice, just the outer leaves took the hit, look at them main stem make sure its green, good think i like to do to cool off the plants is take a water bottle, fill it it reg water that's been aired for 24hr, and spray on the leaves to cool the plant leaves down, and cool the plant down too, i also spray the soil real good. Everyone is different in the feeding, but i would stay away from it for a while take some time to flush it with reg water...and then go from there...

Yea bro it looks like you got a few things going on there. Id agree with the others. How are you measuring ph? "5.5-6.5" tells me your probably not taking readings before watering. Ph cam really fuck with your plants dude. Id recommend doing a flush with ph 6.1-6.5 water. I always water/feed with 6.1-6.2. After that, give them some time to dry out, then just give plain tap at a consistant ph for a few weeks or unil they start to come back. It looks like you may be overwatering as well. just back off until they start to respond. Sometimes the best course of action is to do nothing at all.
Ive seen plants come back from worse my man. If you start goving them what they need now, they will be fine.

TacoMac said:

I don't up pot. That's a waste of time, effort and material. I germinate the seed in a wet paper towel and plant it directly into a 5 gallon pot of regular potting soil with 10 tablespoons of lime and around 35 to 40% perlite.

Never had an issue an net around 5 ounces per plant on average.

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Look, I'm not going to say your doing it "wrong". Yet I hope you read what Notso said..

But I'll up pot every time. Better for the plant and it's a "waste" of NOTHING!

Glad what you do works for you.....But you'll find that your in the minority......Up-potting gives more control over plant growth....

Jordan Steele said:

Right thanks for the info.

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Budman has better answers. BUT DON'T FLUSH!

Lets not fuck with the pH by "flushing". Watering drops the soil pH by around a whole point or more. It comes back up as it dries out. "FLUSHING" with dbl the pot size....tends to keep the soil wet too long (especially with young plants like that) and that keeps the pH too low, causing more problems.....

I agree, quit the feeding for a while....Simply water - pHed to 6.5 and and some Ca/Mg in it.

The plant is young. It's tough. It'll comeback just fine - don't feed it for a cpl of weeks at least..

Im not flushing just yet the plant is on the mend by the looks of it. Greener looking and holding its leaves up. The biggest has a few pistols now and the rest are not far behind. So I think that the raw b-vitamins are working great right now. It contains magnesium and sulphur I think so what are the signs I'm looking for if it's calcium deficiency.