The first couple of flower feedings were with weak cactus juice, but they are currently getting this for three consecutive feedings:

Per 2 gallons water:
1 tbspn...lipton iced tea dry granules
1 tbspn...JD whiskey
1 tbspn...clear corn syrup
1 tbspn...dry plain gelatin powder
1 tbspn...plain non scented ammonia
1 tbspn...Palmolive dish detergant
3 egg shells ground in a mortar and pestle

And weekly 5-1-1 fish emulsion to keep 'em green.