hydro - seedling issues

Hello every one, after many readings and study i finally got some cash and space to go on with my first hydro grow. Now i just cordially ask for critiques and thoughts about my fresh start.

I'm using a small bathroom split in two, for each phase of growing.
intend to go hydro SOG with in 4-5 mothers and 24-30 lollipops when fully operating


Setup vega:
60cmx40cm or ~2,58sq ft
6 lamp T5 14w phillips 93lm/w total of ~7500lum or ~31500lux
rockwool cubes 4x4cm or 1,5'' stuck in 10x10cm or 4'' (iam using rockwool cause i got it for free with a friend)
nutrients i use a local brand no weed related NPK 5-5-5 + 8. 56 liters res.still watering manually to get the right time..but later intend to use a dripper.
3 ways fan

Strains : 3 ak 48 , 2 og kush and 2 white widow , all feminised.

spend 3 days germ. then i put on 1,5'' cubes , all dipn for 5sec at ~5,6ph then careful shaked to get damp

i only grow outdoors before and this first attempt has humble goals, for sure i'm missing something

Lets take a look. the 3 on top is the aks and at bottom the wws

36 hours:

58 hours :

7 days later and here i start to get worry , a few roots became to appear and i stuck then at the bigger cubes.
i think they are legging or something, just set the light about 2'' . i'm think starting on a 400 ppm watering :



this og kush in the middle is late:






please make a comment

many thanks!

possibly bad seeds? they look fine to me tho.

I say this every time, starting seeds in rockwool is just a pain in the ass. Some people love rockwool, i on the other hand detest the shit. Stick with rapid rooters... nearly impossible to over water them and stay nice and moist for a fucking long ass time. Nearly 99% fool proof to start your seeds. Hope you learned your lesson

Yodaweed said:

possibly bad seeds? they look fine to me tho.

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thnx! they are from nirvana seeds

RL420 said:

I say this every time, starting seeds in rockwool is just a pain in the ass. Some people love rockwool, i on the other hand detest the shit. Stick with rapid rooters... nearly impossible to over water them and stay nice and moist for a fucking long ass time. Nearly 99% fool proof to start your seeds. Hope you learned your lesson

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thnx for the advice, i'm only using rockwool cause i got it for free, guess i will go hempy style for the flowering


I said before they was at 7th day from cracked the seeds but i made a mistake .. the seeds cracked in August 10.

Right now they are at the end of the 6th day:


I think they are looking fine, and you guys?

yeah they look fine man,

Did you soak the rockwool overnight or at least for a few hours in pH adjusted water? Very important with rw. The jiffy pucks have always been my choice for seeds.

RL420 said:

yeah they look fine man,

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thnx !

superstoner1 said:

Did you soak the rockwool overnight or at least for a few hours in pH adjusted water? Very important with rw. The jiffy pucks have always been my choice for seeds.

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i did it just for a couple hours with pH 5.6 ... if i adjust ph at 5.6 in my res. in less than 5hrs he is up to 6.2, so i decide to wait just a couple hour to use the rockwool after been soaked, that raise on ph is a normal thing right?

the second pair of leaves is starting to appear , thinking about go on with a 800ppm solution tomorrow

800 is way too high bro, if you must add nutes shoot for 350-400 not counting your waters starting ppm

They shouldnt even have any nutes at this point. That first set of funny looking leaves is stored food. Plain un phed water is all they need.

Even in full veg and flower I don't even give more than 800ppm.

My tap water has ~100ppm

What i have in my mind is give that ~800ppm tomorrow and the rest of the week watering them only with tap water(ph adjust).
The objective is ensure that they get the nutes right when the roots start to assimilate them. And ~ at the 15th day starts with a daily feed nutes at 1400ppm. i have read about growers that use 1400ppm day 1 to harvest.

this is a bad idea?

Your objective would probably fry them, at the least stress the hell out of them. They still have their own food source and don't need anything else. Take some good advice from somebody that has had great success in growing: less is much better with nutes. I have had over 50-60 strains in the last 3-4 years and would never, ever think of giving any plants that young even 300ppm. 800 would shock them and 1400 would probably kill them. I take 3-4' tall plants to start flower at 800ppm and never go above 1000.

I rate your light is way to little for what you want to do. And to far away. And start with no nutes for the first 10 days then quarter strength nutes then half then full strength nutes. ppms of 180-240 or so

superstoner is spot on. I find rw is tricky but also real professional when you learn around its fickle-ness.

RL420 said:

I say this every time, starting seeds in rockwool is just a pain in the ass. Some people love rockwool, i on the other hand detest the shit. Stick with rapid rooters... nearly impossible to over water them and stay nice and moist for a fucking long ass time. Nearly 99% fool proof to start your seeds. Hope you learned your lesson

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bravo! rockwool stays to wet and ph sucks generally

also I didn't see anyone say this, tapwater has to be left out 12-24 hours prior to using it. chlorine is toxic to mj. it gasses off in 12-24 depending on size of container.

Tap does NOT have to sit out. There is no way the levels would be toxic if you can drink it. I have 300+ gallons of RES's and I have never left out water. If you believe its toxic then my plants are the best looking dead plants you have ever seen and I use organics and beneficial bacteria.

superstoner1 said:

Your objective would probably fry them, at the least stress the hell out of them. They still have their own food source and don't need anything else. Take some good advice from somebody that has had great success in growing: less is much better with nutes. I have had over 50-60 strains in the last 3-4 years and would never, ever think of giving any plants that young even 300ppm. 800 would shock them and 1400 would probably kill them. I take 3-4' tall plants to start flower at 800ppm and never go above 1000.

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butterbudface said:

And start with no nutes for the first 10 days then quarter strength nutes then half then full strength nutes. ppms of 180-240 or so

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Ok a bad idea i agree I was reflecting about that , and this idea came based on al b fuct threads, the Al b. mums get no nutes till day 10, then they get 800ppm watering 1x/day, also he says: "I run all 4 of my flowering tanks at 1400, from go to whoa. Could go higher without burning but 1400 produces healthy plants without nute deficiencies." what do you think ?

for safety i'll fed then only at day 12th or 13th, with 300 ~400ppm and a week later raise to 800ppm and stay at this level for the mums. sounds good?

butterbudface said:

I rate your light is way to little for what you want to do. And to far away.

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tnhx for the comment. That light is only for the veg mums and they are almost touching the bulbs, i raise then only to take pics. ~31500lux for veg. I was told that they work pretty good for this purpose and the mums get fully recovered 2 weeks after taking a bath of clones, ready for a new set. For the flowering i'm intend to use a cooltube 600w HPS to cover area of 0,56m2 or 6,0 sq feet.

wristychronicles said:

superstoner is spot on. I find rw is tricky but also real professional when you learn around its fickle-ness.

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thnx for comment. Yes its tricky, but i guess i'm doing fine. I have not yet decided to continue using them or switch to another medium for the lollipops.

jason1976 said:

also I didn't see anyone say this, tapwater has to be left out 12-24 hours prior to using it. chlorine is toxic to mj. it gasses off in 12-24 depending on size of container.

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I never did that.

Sidonha said:

Ok a bad idea i agree I was reflecting about that , and this idea came based on al b fuct threads, the Al b. mums get no nutes till day 10, then they get 800ppm watering 1x/day, also he says: "I run all 4 of my flowering tanks at 1400, from go to whoa. Could go higher without burning but 1400 produces healthy plants without nute deficiencies." what do you think ?

for safety i'll fed then only at day 12th or 13th, with 300 ~400ppm and a week later raise to 800ppm and stay at this level for the mums. sounds good?



tnhx for the comment. That light is only for the veg mums and they are almost touching the bulbs, i raise then only to take pics. ~31500lux for veg. I was told that they work pretty good for this purpose and the mums get fully recovered 2 weeks after taking a bath of clones, ready for a new set. For the flowering i'm intend to use a cooltube 600w HPS to cover area of 0,56m2 or 6,0 sq feet.


thnx for comment. Yes its tricky, but i guess i'm doing fine. I have not yet decided to continue using them or switch to another medium for the lollipops.



I never did that.

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Id be willing to bet you can keep a ppm of 800-900 all the way through your grow cycle and be just fine. 1400ppm is pretty high for most strains.

You gotta remember that every seed is going to be a tiny bit different in what it wants. Its better to start on the low side of the ppm game and when you see defeciencies SLOWLY increase. 100ppm changes at a time works well.


I have a cut that burns above 900ppm.... i e uad skunk plants that like about 1300ppm

superstoner1 said:

Tap does NOT have to sit out. There is no way the levels would be toxic if you can drink it. I have 300+ gallons of RES's and I have never left out water. If you believe its toxic then my plants are the best looking dead plants you have ever seen and I use organics and beneficial bacteria.

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grow hard man. lol