Help identifying reason for slow seedlings

[4d-Rock]

Awesome, thanks @Garage_Grower !

I appreciate your info. On my last two grows I used it at 0.5mL/L throughout veg. About halfway through flowering some spots started to show up, not bad but noticeable, so I upped it to 1mL/L for the remainder of the grow and didn’t have a problem.

 

[Waira]

...nice water! Right, forgot you stated that info earlier,... @Garage_Grower thanks for that confirmation-
...4d, get on the base nutes, and now knowing how much jump to expect from the Ca-Mg, maybe cut that in half and get on the base nutes which also have Ca and Mg in them,....

 

[rick-j]

i think light and air is more important than humidity.my cups come off end of day 1 give it a try possibly a lil too much water early on to.
good luck n keep er lit

i dont know anything about pro mix hp.i use biobizz lightmix,its not got much of anything in it,and i start light feed from day 10.
good luck n keep er lit.

Thank you, Waira has been helping me a lot with my current grow. I haven't asked the question yet on what soil do I use instead of OF, I think iv'e got my answer------

 

[bad dragon bzzz]

Biobizz lightmix....a nice light fluffy soil with next to no nutes,plagron light is very similar,a touch more sand by the feels of it.
Not sure you can get that side of the pond...ffof,promix bx/hp i know the names but thats it.

 

[rick-j]

Ahh cool. Well here is the image from the amazon listing which shows it’s recommendations.

I had talked with someone on the forums which recommended the 18” veg/12” flower for shorter grow areas. So there is probably an argument to raise and go higher as this graphic suggests. But I do have limited vertical space as my tent is only 4 1/2 foot tall.

Thanks, i'm new, That COB SURE GROWS A NICE PLANT, I think the distance will take some time, lots of experiments, I have got a 7' tent, makes it pretty easy to move up.

 

[4d-Rock]

Thanks @Waira , sounds like I need to keep it low on the CaliMagic and bump up my base nutes. As well as starting them a bit earlier.

I would like to try that Biobizz at some point. I live in a small town do selection is limited and Pro-Mix HP was my best bet to having decent quality soil with no additions.

As an aside, i thought maybe I’d give an update on two of the plants I mentioned in the OP.

Currently on day 36, here is the Amnesia Auto from Canuk Seeds

And here is the Black Cream Auto from Sweet Seeds

They are both on the short side but I have been working on the LST to get an even canopy. Hoping for some good growth over the next week.