when to feed seedlings and what ppm?

[LostTribe]

I haven't grown in anything but hydro in over a decade and need some help!

I have some new seedlings in peat and vermiculite organic jiffy starter mix. I normally feed pure blend pro, cal mag, LK, silica blast, cannazyme and a bit of sm90. These 6 seedlings are at 10 days ~ and have been feeding only tap water thus far. When should I start watering and is 450 ppm a good starting point with ro water?

 

[asaf]

Hi LostTribe, I'm use calcium and magnesium to ec 0.3-4 exactly around 350-400µS.
When the plants show deficiency I'm start feeding with terravega +100-150µS total around 600-700µS.
Usually only strong hybrids and skunks show yellow months after seed germination.
Landraces and some strains around 4 months or more.
If some plant make surprises, with foliar feeding in three hours are pretty ph 5.5 to 6, 23ºc, epson salts to ec 500µS and tv to 900µS. Reach 1000µS is a world for me, rarely...

I'm always water in function of weigh and plants appearance. Feeding also depend of water, if you clear the soil more and more feeding, but is good some water drain.

First watering always with ph 6.3 and ec 200 to 300µS without feed and without drain.

You have a lot of images about this in my gallery.

 

[Dropped Cat]

Here is a good thread:

https://www.icmag.com/ic/showthread.php?t=295935

Lots of pics and very interesting, by Dave Coulier

 

[asaf]

Good post, but I'm thinking about my habits, can be different. The original plant never get out of grow space, only it's clones, the pots are small, from 100ml to 500.
Some plants have impediments as malformations and after 6 months some meristem start perfect. I have three divisions in the population, mothers, clones and pre-flowering. Usually three clones per mother. This is very good for test soil mixes, prunes, etc. All of this always in 7x7x7cm, only some mothers go to 9x9x9.
This is one good example:

Father of Pakistan Chitral Kush in 9 black. The green pot is with different soil and it is in an early stage without preflowers.

I think, for my garden and habits, new seedlings in peat and vermiculite, watering from 0 to maximun of 300µS always in function of pot weigh and plant look with also a bit of intuition. PH 6.1 6.3.

But for me one question arise.... Can be determinant the first two weeks of watering an feeding for phenotypic expression?