re: Brightlight's Strain Fest - Organics & LED
Sounds good to me bob. Thought all Dyna-Gro including Pro Tekt was inorganic due to chemical chelating agents like EDTA. Had thought PT to be only non organic ingredient I've been using so now can correctly say 100% organic. Not that I ever say that to anyone. Lol.
Oh I forgot to add... you can purchase the pure Potassium silicate in powder form and mix your own for pennies.
AGSIL16H - from PQ corporation... can get a bag for under 10$... I like the Pro-Tekt because it's already mixed and ready to go and a bottle will last a while, as in several years a while.
I've done a little research into Pro-Tekt et all (potassium Silicate) and how it relates to organics....
2 REAL organic sources are
Horsetail ferns and also
malted barley - I use both and Pro-tekt... proof too much isn't harmful, or I'd have had a problem a long time ago. These 3 are ready to go into soil/foiler.
Also any of the Dynamic accumulators like Stinging Nettles, Comfrey (we grow Bocking 14 = sterile), Dandelions, Yarrow etc will all give us lots of soluble Si after composted. Any of these need to be composted.... Comfrey composts the fastest ... VERY fast as in #s of days. Can top dress with the leaves, that fast.
Of course any of the manures will have lots of Si (and many other compounds - leave that for another day). I prefer the "green" manures I.E. Comfrey.
Again I prefer Pro-Tekt and Horsetail for foilers and malted barley either mixed into soil and also as a tea watered in.
Quoted from the National Organic Standards Board:
"How Made:
Potassium silicates are manufactured using a calcination process that combines silica sand (SiO2) and potassium carbonate
(K2CO3) at 1100-2300°F for up to 15 minutes. The two substances fuse into glass,
which can be dissolved with high-pressure steam to form a clear, slightly viscous fluid, or cooled and ground into a powder.
Carbon dioxide is evolved from this reaction. The solution can be dried to form hydrous powder crystals of potassium silicate."
Sooo not all that "green" looking at it from a fossil fuel use perspective, but neither is growing plants indoors under artificial lights.... so no argument here
To summarize; it's my opinion that Si silica/silicon has an important role in the gardens and specially in indoor container gardening to help with fighting off pests, building stronger healthier plants and to "to alleviate many abiotic and biotic stresses".
Abiotic stress = environmental stuff like drought, too much water, heat, cold and a really good one for you nutrient guys - helps alleviate salt and chemical toxicity.
biotic stress = stress that occurs as a result of damage done to an organism by other living organisms (bacteria, viruses, fungi, parasites, insects etc).
The science.. warning gonna need a cup or 2 of coffee to get thru it, but this write-up is "in depth"... from Oxford University.
Silica in Plants: Biological, Biochemical and Chemical Studies | Annals of Botany | Oxford Academic