well calcium nitrate is most definatly a chemical... so its going to violate your preference here.
perhaps buy a small amount and sit on it... if your organic setup does not work out, then you have something to fall back on.
alot of the "organic" tom growers i know often have to resort to calcium nitrate.
only probem i see here is... they might not sell small quantites. they might want you to buy like a 30 lb sack... thats WAY too much for a small plot of peppers.
you want like less than 5lbs...a single pound even if its possible.
wait. why are we talking about calcium though?
i fogot what this thread was about...
you have a mite problem there. 90% sure. you should verify with some proper magnification if possible.
if(WHEN) you confirm this, you will need an arharacide aka mitacide of some type... honestly you might be fucked becasue you need an extreemly small amount... enough to spray like a dozen plants a few times over.
if you buy a quart at this farm supply place, its going to cost alot, and you will never ever use it all.
i think a quart of avid sprays like 11 acres.