First grow. Not doing so well. :(

So I have 4 girls in my newly set up BC Northern Lights Bloom Box, and 3 of them are hurting really bad. I feel so sorry for them because I can't solve the issue so I need some opinions on taking the next step to healing them.
The three largest of the four are almost 3 weeks old, and all at different stages. The smallest is the newest addition to the family and is about 1 week old. The biggest fem was grown outside in organic compost and top soil, and fed Miracle Gro, and as you can see, is doing the best of them all. The PH level was never monitored. The others seem to be suffering from different nute deficiencies but since I don't have a lot of experience, I'm not exactly sure what they're suffering FROM. I have been feeding them a mixture of Sensi Grow Part A & B, and Vita Boost Pro, mixed with the right measurements. I have kept the PH bewteen 5.6 and 5.9. At first I was convinced it was due to over watering but it's obvious there's something deeper than that.. The ones that have been grown inside a have stunted growth and damage to the leaves.
Picture #1: The 1 weeker.
Picture #2 & 3: 3 weeks.
Picture #4: The only one growing in a organic soil medium. 3 weeks.
Picture #5: This baby is 3 weeks, and was kept outside and fed Miracle Gro in our veg garden. Forgot about this girl until today and transplanted this and another to the veg chamber in the box.

So, any growers wisdom would be appreciated. This is my experimental phase until I have enough experience to obtain successful yields.
Thanks!
xx
Amanda

And don't say I didn't read up on the possible causes, I just need second opinionssss!

It looks good so far. You doing 18/6 on the light and don’t use nutes until it’s bigger and stronger.Cheers

What do you mean, they look horrible! The first four pictures clearly show that they have issues! The only one I'm proud of is the fifth picture, my 3 week old girl. In the first pic, that's my new one weeker. The growth of the other two plants is extremely stunted and the leaves have damage.

So should I just lay off adding any Sensi Grow A & B and the Vita Boost and just maintain the PH level? Funny, the directions on the jugs say to use in all stages of growth. I'm so confused!!

I didn’t notice the leaves on the last one but yeah thats from the nutes. Only thing you need to do now is keep the Ph at 6.5 area and either 24 or 18/6 on the lights. Don’t use the nutes till the plant is bigger and when you do use 1/4 of what they say to use per 5gal.

Also check out books on google, hydroponics the basic, The cannabis grow bible, etc etc

Yep, that's nute burn. It's said that you should wait about a month to use nutes, some use it in about 2 or 3 weeks.

I just started my plant on nutrients a couple days ago and I think it's a bit too soon as it has slight signs of nute burn...

Use this guide: https://www.rollitup.org/general-marijuana-growing/3816-nutrient-guide.html

Aww you guys are great, thanks so much! I'm going to start a journal so I can keep track of everything. So all they need is ph appropriate water?? Thanks again.
xx

After I flush, they should start to grow in height, I assume? How long do you think it'll take until I start seeing results?

Its gonna be a week or so. Ya no nutes and transplant some of those they are ready for a party cup or sumthin.
Whats your light?

Well I've been following the directions on the jugs. Last night I decided to flush all the plants and reset the ph to 5.8. I was told by the BC representatives not to transplant from the 1 inch rock wool cubes to the 3 inch ones until the roots are protruding from underneath because thats when they go into the veg chamber and the machine starts to do its work. So, I checked up on them about an hour ago and my girl that was damaged the most is even worse today. Both leaves are now drooping and burnt, and now I can see that it truly does look like nute burn. I just don't know what to do with her anymore. The biggest and healthiest plant was grown outside with Miracle Gro and barely touched, and it's doing great. I guess I need some help with measurements because, like I said, I'm new at this. Thanks guys.

Oh, and the light sched is 18/6, it's automatically programmed into the machine. I figured 12/12 was too little light.

But they're so stunted in growth, I know I'm doing something else wrong... Any ideas? I've looked at pictures of 3 weekers and mine doesn't even compare...

it should be bigger if u had them that long!

sync0s said:

Yep, that's nute burn. It's said that you should wait about a month to use nutes, some use it in about 2 or 3 weeks.

I just started my plant on nutrients a couple days ago and I think it's a bit too soon as it has slight signs of nute burn...

Use this guide: https://www.rollitup.org/general-marijuana-growing/3816-nutrient-guide.html

Click to expand...

He is growing hydro and if were to wait a month to feed them they would probaly not last the month. 1/8 strenght to start and ease them up from there as the plants mature.

1/8TH strength... how do I achieve that? The Sensi A&B ask for 1.8 ml per Liter and Vita Boost Pro asks for 2.5 ml per Liter. I have a TDS meter but I'm unfamiliar with how to use it and prefer to measure the old fashioned way. If you think it'll help to use the meter instead, though, I will.

teddywillkill, obviously they are not up to par. do you have any suggestions?

First off you got to smoke a fatty! Next relax!!! Cut them back to 2ml/gallon A/b add cal-mag if you are using Ro. Easy on the light for a while (until they look 'happy') If you have no roots in the bigger cube yet, pull them out again and don't put them back into the bigger cubes until you have lots of roots sticking out of the cube. I don't use rockwool because I seem to be to stupid to dial it in with the constant nute build up and over watering issues rockwool presents, but to each their own. Rooter plugs work best for me followed by hydroton. Most important: don't love them to death!!! Find a couple of guys that grow the same style as you, check their journals out, pm them for help, and you are off to a good start.

Good luck!
Kind

BTW, the cubes should never be dripping water, and make sure to let them get lite before watering again.