This is a Super Lemon Haze seedling at day 24. The stem above the cotyledons first turned red now its moving up the plant and is on the petioles as of today. Also the 1st set of leavers turned turned yellow at the tips.
I used black earth as a medium without lime or any other additive so I'm not sure of the pH but the run off is above 7. I have been only watering so far with a pH around 6. I thought between the seed and organics in the soil i wouldn't be P deficient but looks like it could be. The temp is steady 78 but has been down to 70 not regularly though. If anybody has a thought or experience it all helps thanks.
Seedling with red stems
- Thread starter flampkin
- Start date
Moebius
Well-Known Member
Never heard of Black earth so I Wiki'd it.
Chernozem (from Russian: чернозём, tr. chernozyom; IPA: [tɕɪrnɐˈzʲɵm], meaning: black soil), or "black earth", is a black-coloured soil containing a high percentage of humus[SUP][1][/SUP] (7% to 15%), and high percentages of phosphoric acids, phosphorus and ammonia.[SUP][citation needed][/SUP] Chernozem is very fertile and produces a high agricultural yield.
Next time I would mix with a regular potting compost, looks a bit rich to me especially for seedlings.
Chernozem (from Russian: чернозём, tr. chernozyom; IPA: [tɕɪrnɐˈzʲɵm], meaning: black soil), or "black earth", is a black-coloured soil containing a high percentage of humus[SUP][1][/SUP] (7% to 15%), and high percentages of phosphoric acids, phosphorus and ammonia.[SUP][citation needed][/SUP] Chernozem is very fertile and produces a high agricultural yield.
Next time I would mix with a regular potting compost, looks a bit rich to me especially for seedlings.
Ilovebush
Well-Known Member
Hey, I've mainly experienced purple/reddish stems with low Ph. I'd recommend a Ph of 6.3-6.8 in soil as each strain has a slightly different requirement. I like PROMIX for the simple fact that it is Ph balanced and simplifies the process somewhat. Adding a buffer while achieve the same result but it's best to do this before transplanting. Great work...cheers!