For freshly planted seedlings in a hydroponics system, should the first fill of the system be of mainly just ph water with a bit of worm compost tea and myko stuff for the roots? Are the suggested seedling veg nutes too much? I feel like they might be.
Let me tag @beachglass… I know nothing o hydro…
each type of system might require different amounts…I put a small amount of nutrients, with calmag and hydroguard in my system
absolutely if you have a seedling
Hi @Caligurl . I know nothing about hydro either. lol. It has something to do with water. we will have to wait for the hydro peeps to chime in.
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@kaptain3d I cannot remember (obviously) who our go to hydro is… perhaps @HappyHydroGrower
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@repins12 is quite good at it and I can’t remember anyone else for now… 
Maybe @Not2SureYet ?
And doesn’t @Myfriendis410 run an ebb & flow setup? 
PS: I may be totally off… 
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I use Jack’s and go full strength the whole time. I don’t put my seedlings in until they are 7 days above ground
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Never use organics in hydro. Best to run a mild nutrient solution unless running something like Jack’s. It can be run full strength.
Top feed until roots protrude from the bottom of net pot and set liquid height to 1 1/2 to 2" below net pot. Use plenty of air. Temps need to stay below 70F.
If doing ebb and flow, I would run for 1/2 hour every 3 hours and initially cover half the depth of each net pot. If you have a digital timer you can run it for 5 minutes every 3 hours or so.
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Clonex makes a nutrient, I use that.
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I know @Myfriendis410 has given you the correct advice @justinsloan The reason you should never use anything organic in hydro is that organics makes a big mess by clogging everything up. Pumps, air stones, pipes…I’ve made that mistake and it was a disaster that took days to clean everything. It was also impossible to keep the ph balanced
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What do you mean by organics? In my first trial of seeds, I noticed that cannabis plants are very sensitive to nutrient burn and when you are germinating them, you cannot germinate in a seedling solution of nute water with everything that you have. It had to be root stuff and worm compost and ph water and for foliar nothing but water and it seems like that kind of regimen for the first 4 weeks for females and maybe 3 with autos which is what they hydro is for. Part of me things though, because it is never actually soaking the cube that it would be okay for a watered down full nutrient solution for seedlings, just maybe half the recommended amount. This is the root stuff that I use, I only used half the recommended seedling amount for germinating and after that it is pretty much just ph water.
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This is where I got the solution idea for germination and continuing on from that point for the first few weeks, How to Start Cannabis Seeds Right — Ed Rosenthal
root solution https://www.amazon.com/dp/B00AU8JKR6?psc=1&ref=ppx_yo2ov_dt_b_product_details
forgot to include links
FYI seeds carry everything the seedling will need for approx. 14 days.
After that it’s a plant and can start nutes. WHAT you use will dictate whether you have to back off the strength or not. I use Jack’s 3-2-1 program and start 'em full strength as soon as they’re transplanted. I germinate and start in rockwool which is saturated in PH’d water then squeezed almost dry. They remain in that for their whole grow and just plant the rockwool in the planter.
This is a fairly long video but well worth it. He’s a professor at Utah State and been growing hemp for 30 years. He’s also the President of Apogee Instruments: they make quantum light sensors.
Kinda late here, i will germinate in rockwool cubes, then transplant that to a 3" rockwool cube. Then from there to a 8" net pot with tiny rockwool cubes filling the space.
I soak the cubes in about 600 ish ppm food and transplant instead of water them. Then keep water level about 2" under net pot to start. The roots will grow into the nute solution.
When i have in hydro ststem i start with about 750 for them to grow into.
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That reminds me of another issue that I of course, as a new grower constantly going through trials and doing research and looking for a system, is something else that worries me. I use the air pump that came with my hydroponics kit and it does not seem to bubble the water at all, but rather just ripple it, so I have it right now starting at one inch above the net pot. After my first trial was a fail and I believe that the seedlings were able to germinate and leaf out, but as soon as they did severe signs of nutrient burn would show and I think it was in part, from soaking the rockwool cubes originally in that solution, especially since the seed already had enough nutrients for 2 weeks for the plant. And what do you mean by 750?
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Thanks @Caligurl for the tag…
@justinsloan Depending on the nutes you use may depend on when to start feeding. Like myfriend said, organic is not good for hydro.
I also use Jack’s 321 full strength from start to finish. Jacks is one of few that you will start at full strength. It’s stupid easy. Even I can use it. There are plenty here that use it. There are also other products suitable for hydro like General Hydronics.
Plenty of folks here that can help. Have questions, ask away. Good luck and keep’em growin! 
What are you guys talking about organic for hydro? Do not use a root solution? That is odd. I am sure that is not right.
it says right here in the description for the product that it is for hydroponics systems as well. I have not used any nute that indicated to specifically organic.
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@Graysin care to chime in on these nutes for hydro?
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