On to the pesticide !
My first grow was 99% organic.
These gnats scoff at my diotomaceous earth.
They crawl on it.
They multiply.
Verily though my sticky potions have conquered hordes of flying beasts,
they doth mock my crushed sea shells of antiquity.
An alchemist from the land of Lowe's hast sold at small price a six fold packet of crushed poison to float in mosquito breeding lakes.
In consultation with the king, he revealed the magic of converting this poison into a tincture for the eradication of under ground gnats.
Though I have not perceived these underground gnats, I must trust the wisdom of earlier times and proceed apace.
The tincture has strengthened in the bowels of my dungeon under the influence of the moon and planets.
May the goods of antiquity and the purveyors of "science" bless me and devour this scourge upon the plants of Lady Mary Jane.